ninchi_cat's manga / #Surgeon(1)

9/10 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! https://kktoon35.com/%EB%A9%94%EB%94%94%EC%BB%AC-%ED%99%98%EC%83%9D https://manatoki95.net/webtoon/447034