@@issabino9903 lol Im a korean.. The character which looks like circle is called 'yee eung'. It is used as pronounciation like oh(오) ah(아) eh(에) or 강(kang)
For people who are wondering why there's a lot of japanese comment: a few days ago theres a tweet circulating for a picture of a warning for apartment tenants basically saying "we can hear you playing chopin etude 10-4 from midnight to 3 am and we can't sleep because of it". Thats why a lot of people in the comments are "i can understand why they cant go to sleep"