Shiawase ni Nari na.

Daichi, a university student working part-time at a bookstore, falls in love instantly with Kai, a beautiful instructor! Acting on impulse, he confesses his feelings for Kai and asks him on a date. Kai easily agrees and the two start dating. However, Daichi overhears rumors about Kai. Someone told him that Kai believes “I do romance just for fun. I don’t do anything serious”. Will Daichi’s straightforward approach win over Kai’s elusive and inexplicable heart?