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 Hina turns down Tanabe's proposal, the wolf suddenly sheds his sheep's clothing, turning from would-be suitor to full-on stalker. Despite Hina's best efforts to break things off, Tanabe continues to pursue her, his advances growing more obsessive and more extreme by the day. Though cornered and near her wit's end, Hina refuses to wrap Natsuo up in her problems and resolves to settle things on her own, a choice that inevitably leads to the worst possible outcome...