Teal Orbs's manga / #time travel(5)

Male protagonist is a 40 years old surgeon that has cancer and dies. He's brought back to his high school days and starts from scratch. Wanted to become dermatologist aka rich but he perfected his surgeon skills and got accepted into surgeon program. A rival ("friend") from school always got second place because of him, has inferiority complex.

Worth rereading

Meh. She thinks the road to happiness is having sex with her boyfriend from highschool.

Went to the past 8 years. They try to prevent brother and sister from marrying and dying in a car accident soon after. But they develop feelings for one another. Dating.