There was this series I read super long ago and can't remember the name for the life of me. I remember the mc is a yankee type guy and hates the most popular guy of the school because he gets all the girls or makes fun of the guy or something.

So he calls him out to a fight but then he suddenly turns into a girl because of a drink Something like that. Then at the time of the fight the popular guy thinks the guy who is now a girl is a cute girl so he Keeps trying to get her to date him not aware that he's the same guy from before .

I'm pretty sure it's not Yaoi lol although maybe it will be.... I didn't get very far. Anyways I'm pretty sure it was gender bender and school life.

If anyone knows this series, lmk! Thank you in advance~

This one maybe?
Nyotaika Yankee Gakuen - Ore no Hajimete, Nerawaretemasu.

Idol Pretender.