hi im searching for a yaoi manga, that was one of the first that i read, it was a long time ago, and for some reason it was in spanish, i know lil of spanish so i could not understand much of it but ill try to decribe it the best i can:

it was a boy a cousins love theme, it was a about a boy who cousin come to stay in his house because it was close to his school or something, his a genius and like to tease his cousin, that all i cant remeber i hope is enough