Seungjae taking the subway alone [The Return of Superman/2019.05.19] 

seungjae look like an "IDOL" now. he's super handsome .

Seunjae seems like his gonna be some handsome CEO that came out of a k-drama😂

I'm like a proud aunty to seungjae he grew up very fast. I'm gonna miss him

Ko Jiyong really made the most out of TROS. He was able to teach his son life lessons without worrying about his safety, like going out and such. Although their are times that he secretly follows seungjae, with the cameramen still follow his son.

hes a not baby anymore hes such a big boy now omg my hearteu :'(( ❤😥

Seungjae is the reason why I started watching TROS Its been a long time huh

I'm gon'na miss you so much seungjaeee. You were my first ever favorite baby in this show, but now you've grown into a fine young man, and have to say goodbye. I hope you continue to be charming as ever. I love you so much 🙂 Ps. Appa jiyong, you should make another seungjae, so you could stay longer in this show, just like yian. Hihi. Love you guys 🙂😘

He’s so smart, tbh one of the kid tros who bring me back to this program after haru, triplets left I see him growing up towards this program, and finally the time he left about to come I hope you grow better seungjae my bae

Am i the only one who feels so proud of Sungjae? he is growing up so fast and he is so smart and brave, i feel like im a proud parent watching him grow up for almost 3 years now, huhuhuhu, time flies so fast, our sungjae

Sometimes when the kids run off alone, I forget about the camera crew and get scared. He's not even my kid but I felt proud to tears with how he made it most of the way, asked for help, and was polite

Koo Seungjae thank you for showing us how pure your heart in this cruel world, thank you for make me believe that happiness from being a kind person its real. Now, please grow up healthy, lovely, and happy. And Jiyong appa and Seungjae eomma thank you for deal it to join this show and make everyone happy even in the darkest day just by watching our lovely boy Seungjae♡

I think I'm gonna start rewatching Seungjae's episodes😭

Seeing Seungjae takes the subway alone makes me cry... He is growing up soo fast😭 i can't :(( i think i can't watch their last episode sksksk i cant watch tros the same way again :((

Really miss him so much 😭😭

Even if he doesn’t know we’re to go and what to do, he is not afraid to ask, some children would stand and cry

He's handsome he's really smart He's genius He's kindness heart He's intelligent He's almost perfect ❤❤

I'm going to miss seeing you here seungjae :(( after the triplets you were the one who brought me back watching tros again. I love you our genius handsome baby!! 😭💖

Going to a random shop, asking for the contact of a friend, and that owner knowing the friend feels like it came straight out of a drama!

Wow he never forget to say thanks 😊 to people who help him

that "let me know when we reach yaksu station" IS THE CUTEST THING EVER 🥺🥺💖

Just seeing jiyong's ig post made me cry. I don't know what will happen to my eyes if ever seungjae's last episode would air. Argggggh love this baby so much 💗

I'm gonna miss you seungjae! After the triplets left the show you were the reason I watched TROS once again. Thank you for sharing your life with us! Please grow up well, we will miss you!

Gotta binge watching episodes of Seungjae as it was official that he will soon be graduating on this show, return of superman.

*hi to those who misses Sungjae so much :

He has a lot of trust in his son. And his son is so very smart for his age!!!!

This makes me sad, I'm gonna miss you Seungjae 😖😭

*WATCHING SEUNGJAE IS WHAT I ALWAYS LOOK FORWARD TO* Thanks for making me happy with your cuteness!

NO MATTER HOW MANY KIDS THIS SHOW WILL HAVE SEUNGJAE WILL ALWAYS BE MY FAVORITE KID! LOVE YOU SEUNGJAEEEEEEEE!! I WILL SURELY MISS MY HANDSOME, POLITE, GENIUS, CARING AND LOVING BABYYYY!!! 😭😭💙💙💔

In this video,Seungjay is only 4years & 7 months old(international age)soo wise & smart,a very brave one,not afraid to walk alone,an adventurous kid,soo proud of him,really raised well by Dad & Mom🤗😍 Luv 💖💖💖 Uuuuuu more Seungjay 😘😘😘

It’s funny how his father lets him take the subway alone While I’m here not allowed to go to my friends house alone

Can't believe this animal loving boy is going to be gone. No more SianxSeungjae brother bonding 😭😭😭

Seungjae has always been my favorite!!! I'm gonna miss him :( He's so smart and social

It's so sad to see you leaving baby😭...wish you grow into a good and great boy ❤...hope we meet to watch you again! Forever love you. Saranghee seungjae* Wow thanks for the likes😍

it's so nice that they let him have moments "by himself" to try and learn and explore the world, but are still there to supervise just in case he gets in trouble. ^^ it'll safely let him mature!

Its really safe in Korea for kids to commute like this alone or run errands alone. But I never expected Sungjae to do it at 5 years old. I learned riding the subway and the bus when I was 8 and before that, I ran errands at shops near our house when I was a kid around 5-6. Sungjae really is smart and grew up smart. His communication skills are advanced for his age

I'm gonna miss you so much baby seungjae. You're the first one to drag me into this The Return of Superman madness I have right now. I love you. Please take care always.

aww Seungjae is leaving~ But it's ok he will be going to school for advance kids and that should be their main priority. We will miss you seungjae!

Seungjae was always my favorite kid in this show i got so attached to the show because of him❤️ i was so amazed of his smartness and intelligence. The way he talk and think i was so impressed. I want to say to his mom and dad thank you for raising such an awesome child like him. I’m going to miss Seungjae :(

Seungjae have changed a little his hair is longer than before and he looks more handsome he is so cute

Seungjae is so big now. Ottoke😭😭😭 i’ll be missing him😭😭

*being paranoid! I read the TITLE WRONG 😂 i thought "SEUNGJAE TAKE GOODBYE EPISODE" 💔😭😭😭 i'm not yet ready huhuhu*

I don't think i can watch seungjae's last episode. Huhu i might cry 🙁

For 17 months being with Seungjae, watching him grew up so well, learn new things, being so goofy, so kind, so smart, watching his every journey. It's just sad that his time in ROS will be ending. It's sad but I'm seriously happy to know this kid. I'm so proud seeing him being this responsible and independent at a very young age. Seungjae-ah!!! Keep growing so well. I'm always rooting for you. You seriously have a bright future. 😭💖

I really love ko seungjae. You grew up so fast 😢

I’m glad the cameramen made sure they were at a bit of distance but were close enough to keep an eye on him so he could have a little adventure but still be safe.

I watched you from your first episode until your last episode. Gonna miss you so much seungjae. 🙂😚

seungjae is really irreplaceable😭 i have no reason to watch this show now aaaaaa i'm so sad

he's so smart and brave to ask someone

I'm literally crying rn because I just realized how Seungjae litterally just grew up in front of our eyes and in no time at all. Once i finish watching all these videos I'm going to be even more sad but I'm glad i stumbled upon them in the first place. I've learned so much from him and his dad and It makes me so happy that they were able to share a part of their lives with us. ;^;

Seungjae, my son. Thank you so much for bringing happiness into my life. For restoring my faith that there is still hope for our future if the people would be as compassionate as you are towards everyone, specially with animals. You have made me happy during my sad days and gave me strenght during my student & review days. Even when I experience some heartbreaks, I was happy when I watch your video... 2 years and 5 months ago, when I first saw your video. And from then on, I have always been rooting for you... I just hope you got a little brother soon so you can still join the show but too bad it didn't happen. I know there are more things in life that is in store for you. I would always be hoping that you would enjoy your youth to the fullest and be happy and healthy always. I'll be praying for you, my son. I'm so proud of you. Please grow with a kind heart and may you always maintain that pure heart of yours.😍 Seungjae, noona is really thankful to you... Please grow healthily! And if you'll follow the path of your father, I'll be cheering for you! 😊 To Jiyong and Yang Im, thank you so much for sharing your son to us. May you're family always be happy. 😍

Seungjae, time pass so fast you're a big boy now. I will miss your episode Ko Seungjaeeeeee. You've been part of my college life 😢

It's not long since I watch TROS. I watch all the episodes of suengjae and now I am reading comments about him leaving. It's literally been only 5days... Thank you suengjae for making this noona happy.

protect this child at all cost 😭 how I wish we can be together all throughout his journey of growing up 😭❤

Seung jae ..why you so smart?i feel so proud for you..until i cry...how can you be ao brave at your age..i'm gone miss you seung jae..

Iknow it's 2 years to watch I couldn't get enough seungjae so loveable like his dad so cool!! 🇵🇭 🇬🇧 🇬🇧 seungjae smart little 👦 boy xxwatching from England 🇬🇧 and Philippines xxx

man i always say this when i watch Seungjae's parts but he is seriously an impressive kid. His parents have raised him so well and are in turn lucky to have him

waaaaa the first "baby" boy that i watched in tros will leave nooooo 😭😭 aaaaaAaa i will miss you ko seungjae and especially to his best appa in the world ko jiyong 💜

Come on he can’t leave,he’s the reason I watch TROS. ♥️he made me laugh,cry and I even got smarter in advanced 😂...... it’s too soon at least let him air on other series. Please 🙏 he’s the most adorable beautiful human-being, Seungjae please never change♥️♥️💖

Sungjae is a sweet and smart boy. I'm going to miss him :(

I haven’t watched a video of Seungjae in 2 years! He’s so big and handsome now!! I feel so proud!

My smart baby! I will miss you for sure :'( please grow well seungjaeyaa! ❤

Im gonna miss you seungjaeya❤ Please be a good boy and always remember that we will always love and support you We wont forget the smart , loving , kind boy... the one that hates to see animals or plushies gets hurt We wont forget the only child kid but still acts like a hyung/ oppa to younger kiddos... We wont forget the boy that respect elders, responsible and brave We wont forget that personality , the uniqueness and quirkyness that you showed us ALWAYS BE HAPPY , HUMBLE AND GRATEFUL❤ WE LOVE YOU BIG BOY❤

Smart boy! I love you 3000, seungjae!!😍

I’m literally in tears watching this. I can’t believe he will no longer be in the show. I’m going to miss him so much. crazy how much I love this little talent and smart boy. thank you for allowing me to watch you grow up. thank you for all the amazing memories. stay happy and healthy. I will truely miss you 🥺

He really looks like his papa now😭i didnt really wanna watch it cause i know whats gonna happen but 😭😭😭😭😭😭😭😭😭😭😭 He has been the reason why i started watching this and now😭 😭😭😭😭 im gonna miss him

My first updated episode!!! Seungjaeyaaaaahhhhhhh!!!💞💞 Why do you have to grew up real handsome?!?!?!??😭✊

Tats a Smart kid of an intelligent dad n mom. He doesnt even forget to thank everyone who helped him even when he is in a hurry and sleepy. Love u suengjae...baby u r the best.

Watching Seungjae in TROS is like a routine I need everyday. The upcoming last episode with him is not something I look forward to 😭😭 Seeing him take the subway alone now is like watching your own kid grow up too. I will miss this real smart and very empathic kid~ 💛

I'm watching again because I miss Sungjae💖🥺 (2022)

Seungjae will always be my most favorite kid in TROS. Such a lovely, charming, intelligent and caring boy. God bless you with lots of happiness , success and good health. Will miss you Seungjae everytime I watch TROS.❤️😍😘🎉

we're all gonna miss seungjae big time when it's time for him to say goodbye on this show :((( i hope you grow up well bubs

He is a big boy now :(( I’m so sad that he’s leaving!!! I cried so much when the triplets leave the show, and I think I will cry as hard when Seungjae leave :(( especially they already shoot the last episode huhu, take care always Seungjae, stay bright and intelligent!

Seungjae i'm gonna miss your appearance here !! :'( Iloveyou seungjae. 🇯🇵🇵🇭

Awww my seungjae lots of love from Nepal Why you grow so fast😭I will miss u my baby😘

I miss Seungjae love youuu

The only reason why I watch this show will soon leave the show. I hope he grows up to become an ever better human. Lots of love. ❤️❤️❤️❤️

Nooooo don't leave us ko suengjae seriously ur the reason why i'm here in ROS ur my one and only favorite we love u ko suengjae i'm not ready for ur leaving 😭😭😭😭😭😭😭

Petition for Yian's family to join superman so I could get cooking tips from the Dad 🤣

seunjae's hair makes him look like an idol

I am still watching him 🙃💜 I don't know why but I really love this kid 💜

Seungjae grew up to be a handsome and very smart kid and he is very adorable. I'm not prepared for the fact that he will leave this TV show ㅠㅠ

You've grown into fine man!!! You're so handsome, Seungjae. I'm gonna miss you. 😭

Its going to be sad because one of my favorite children in tros is leaving.... I will always support and love you sungjae😊😊

He is really clever proud to be his fan💜

Seungjae is growing too fast .. and he's becoming more and more handsome.. i will really miss him..😍

goodbye my little genius angel😔💔 i will miss youuuu seungjae😪💓 ILOVEYOUUUUUU💓😔😍

Seungjae sure is smart 💕 I dont want him to leave the show :'''

To be honest, Seungjae is the only reason why I'm even watching TROS in the first place. I'm going to miss him. But I know he will grow up to be a great man. Fighting Ko family! 💖

Man I'm gonna miss him, 성재 was the reason why I started to watch tros. 고성재, 고지용...감사합니다 for being part of our happiness wishing you good luck 사랑해요💛💛💛

Seungjae's bright personality makes him even more adorable.✊😄

The smartest kids and I love him so so much ❤❤❤

im gonna miss seunjae so much😭he is/was/will always be my favourite baby on the show. Thank you for making me happy, you grew up to be such an intelligent and ingenious young man! Ill miss you so much :((

I just can't get over how tall he's getting & his long arms & legs omg!!! He truly is beautiful ...I'ma miss my baby 😢😢😢

Seungjiae you're brave boy, I'm 20 years old but my parents still not allow me to take public transportation alone. I'm sick of it🤣 my dear parents if seungjiae can then why not me?🥲

Aaaaaah seungjae is so polite and so smart :)) Good jod baby boy!! Im so proud of u since day 1. Im gonna miss you 😭💖

Omg i already miss him:(((

Seungjae was the reason I started watching this show and I can’t say enough how much I’m going to miss him!!

Seungjae~ah thank u for making us happy💕 gonna miss you😭 stay mischievous😂, smart and we hope you'll be an ambassador of Dokdo when u grow up😊🙏

pengen punya anak kayak seungjae♥️pinter sama kalem banget haduh adem liatnya

Im your Filipina fan seungjae, i Miss you a lot, i play and play your episode everyday, i wish i meet you someday..