ReLIFE is a Japanese manga and anime series about a 27-year-old unemployed man named Arata Kaizaki who is offered a mysterious experimental pill that makes him look 17 again. He enrolls in high school for one year as part of a program called ReLIFE, tasked with reliving his teenage years to fix his stagnant adult life. The story follows his daily struggles to fit in, make friends, and navigate adolescent dramas while keeping his true age a secret. Readers enjoy it for its realistic blend of comedy and emotional depth, exploring themes of second chances, personal growth, and the bittersweet nature of leaving the past behind.