On the eve of his 30th birthday, salaryman Yoshino Kiritani decides to go to a gay bar in the hopes of having sex with another man for the first time. He is quickly charmed by college student Rou Nishijima, and the two spend a night together. However, while Yoshino hopes that they can grow even closer, Rou seems ready to move on and continue his playboy ways. In a tale of late first love, Yoshino struggles to decide whether to move on or try to make their relationship into something more.