The uke has black hair, wears glasses and is unpopular. The seme is popular, has blond/light hair and calls him Nacchan and in the first or second chapter he was invited to play poker (?) by 2 other popular boys because apparently the seme would come if Nacchan was there. It was also noted in the first chapter that the 3 popular boys were in the same class by some girl I think.

Sounds like wakaba no