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!
After the fiasco surrounding his first anthology, Natsuo harbors doubts about his writing career. In spite of Rui and Hina's support, things continue to go south, as the love square finally heats up!