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!
Natsuo shakes off Momo’s advances and rushes out the door in search of Rui. However, he only finds her on her way back from meeting with Al… The rollercoaster love triangle finally reaches the climax. Who will have Rui’s heart? The jumbled knot of love finally unravels!