starflakes

ML (adult) returns to high school and meets the FL who has some connection to his past again. FL is a contract teacher trying to get a full time position. The school leaders are corrupt in some way/shape that has to do with separating kids by academics and elitism. ML also has a younger relative who is also in the school, and both have side characters who struggle with the pressure put on them by over bearing parents. Together the ML and FL must work to take down the corruption and keep kids safe.

-characters in both work in an ad agency
-ML is FL's boss
-ML is cold/strict to FL but secretly caring
-ML essentially mentors FL
-FL is more focused on work than love
-ex-boyfriend (who also works in ads) comes back and wants to date again
-similar side characters
-romance comedy

-Long time Friends to Lovers
-Slow burn romance
-ML falls first
-ML is a photographer
-FL likes someone else initially
-Similar relationship dynamic of the two leads

Although different in genres and setting (Blue Birthday is a high school based romance, 365 is more pure thriller), they both have a similar premise of going back in time to save a loved one. They also have some similar twists (although I wont say more so as not to spoil). Blue Birthday is more light-hearted while 365 is more dark and suspenseful, but if you're looking for a similar set-up and don't mind the tone changes, give it a go!