Hello I'm trying to find a novel The Mc is uke/bottom He is a phoenix trying to hide his identify so he is trying to pretend to be a mushroom so he tries to be sluggish, slow, vegetarian and stay in the shade. Hes hasn't transformed yet in the beginning Ml is a dragon I think and he likes to paste gems all over his bedroom wall Mc and Ml live in the same dorm Also Mc has a hard time hiding his identify as he really want to sing and bask in the sun
This post sounds a lot like what your asking for Is it After The Breakup, I Became The Marshal’s Wife
Sounds like, Arc 2, “The Cannon Fodder Doesn’t Want to Die” https://www.novelupdates.com/series/the-cannon-fodder-doesnt-want-to-die/