sorry but she’s actually a girl and is just using her turning into a guy halfway into the day as a way to get closer, it really isn’t yaoi either. if it were it would be way more saucy and that being said, based on your logic it would be a wholesome bl. anyways, the mc is a girl and just has a condition that changes her into a guy at certain times so it certainly is romance and nothing else.
stop misgendering the mc, she's not a male and is biologically female. she can't change the fact she changes into a guy at some points in the day, but she's still female and doesn't recognize herself as a male. her male self is treated as if he's part of her but like it's all a trick or an act by the mc herself... sorry but i don't see your point, she's still female.
SET UP YAOI GENRE