I love this video. He was so hooked on the webtoon and the girl making the behind the scenes tried to get his attention but at end she kind of gave up and the edits were hilarious because it was more about Yumi's cells than about the shoot.
I would like to snatch that phone, throw that away and claim my place on that lap. What happens next is quite personal but you all can see him getting dressed there. So yeah that's what it is!