Kim Jihyun, who lived his life as a disreputable surgeon, gains a second chance to relive his life. He then goes back to his middle school days, and live his life to the fullest unlike before, he studies nonstop. His goal is to become a dermatologist who make lots of money instead of the poor surgeon he was from previous life!
Genres: Drama, Medical, Psychological
Theme: School Life, Time Travel
Format: Long Strip, Web Comic, Full Color
Ah now I get why it is mostly MangaDex, because it opens by default in Neko and TachiyomiSY
Will share in MangaDex if I don't forget to change extension
Don't think it's an issue on which one you use.