My First Love Turned Out to Be My Homeroom Teacher

[Slice of Life + Soul Transmigration + College Entrance Exam + School Life] A successful thirty-year-old man is killed in a car accident and transmigrates into the body of an eighteen-year-old high school student whose confession has just been rejected. He plans to make the most of this life with the experience and skills he gained in his previous one, only to discover... My new homeroom teacher is my first love? My childhood sweetheart is the daughter of my sworn big brother? My deskmate is my ex-girlfriend’s younger sister? The high school arc is a little slow. The focus is on the college arc.