High schooler Natsuo is hopelessly in love with his cheerful and popular teacher, Hina. However, one day at a mixer, he meets a moody girl by the name of Rui and ends up sleeping with her. Soon after, his father announces that he's getting remarried to a woman with two daughters of her own. And who shows up in tow, other than both Hina and Rui?! Natsuo's outrageous new life starts now!
Having come to terms with his growing feelings, Natsuo chooses his peaceful days with Rui. That is, until an unexpected reunion with Hina shakes his resolve… It’s the nonstop cycle of meetings and farewells that is life. With new girls entering the mix, love grows ever more complicated.