Angel Beats!, ReLIFE Recommendations
In both anime, the protagonists get to redo their lifes in high school.
A life in high school as problem solver! The main character gets a second chance in/after their life. In his new life in high school, he makes friends fast. He's focused on solving his friends' problems.
Reliving high school lives and solve problems those around the MCs. Great comedy and dramatic scenes. Friendship and romance.