Shinshi to Norainu

Banri is a college student who goes with the flow. One day, he meets a well-educated business man, Masaomi, with whom he ends up in bed. This relationship was supposed to be a one night stand, but Banri confesses that he wants to meet Masaomi again after discovering his cute and honest side. However, Masaomi tells him that he has a fiancée and that he will never be meeting Banri again. He leaves by ending the night with those words. A few days later, Banri discovers that Masaomi is actually the heir of a big and well-known plutocrat!?