Welcome to Succubus High! Vol. 2 (manga)

HE'LL DO WHATEVER IT TAKES FOR EXTRA CREDIT

The results are in: Takeru's classmates have given him a failing grade in his role as Goodwill Ambassador. Faced with the possibility of embarrassment and, worse, expulsion, he vows to do whatever it takes to earn their approval. But that's a dangerous proposition when his classmates are a bunch of voluptuous succubi intent on harvesting his carnal energy. And it's even dicier with half the school mistakenly convinced he's into S&M!