Hasegawa Tazio's activites

There is one genderbend manga I think it only has a chapter thats what it had when I read it. Basically theres a boy who turns into a gurl when ever his heartbeat rises and his bully falls for this girl version of him.

I dont really think if its bl but its a manga thats about a gay mans real life where he speaks about how he struggled with being gay. I remember he finds a partner at the end but rather than romance it focus on his hardships accepting himself and coming out.