i used to read it on mangadex, can't remember the name for the life of me.

there's this average girl that likes her co-worker (they work at a restaurant). she bumps into a blonde, very pretty girl (that turns out to be a male beautician) that helps her get ready for her birthday, that she thinks she'll spend with the co-worker.

i also remember the FL and ML playing basketball. please help.

Sounds like Cinderella Closet to me. But I don't remember much about basketball in it.