Well, I did some research... it calls in Korean 청춘은 흐른다, which is "Youth Goes By" in English. I also found the name - it's two people. I believe one is the writer ant the other is the artist. The names are 바트 로그아웃, I don't understand Korean, but I can read it (so it's just a guess), the artist is Log Out and here is a link to their twitter account https://twitter.com/noranbit?s=09 .
And the author is Bat.
You can read the official in KakaoPage, https://page.kakao.com/home/49845485 .
I'm sorry I couldn't find any translation
Hey Guys, does anyone know the title or the name of the author. I can´t find anything. Maybe a english, russian or german version.. https://toonkor.red/%EC%B2%AD%EC%B6%98%EC%9D%80-%ED%9D%90%EB%A5%B8%EB%8B%A4 thank you!