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!
A serious incident breaks out at Forester over Yuka's forbidden love! Natsuo's change of scenery does nothing to end his troubles, as he once again finds himself wrapped up in romance. Rui and Hina's surroundings begin to change, too, as one meets a new coworker, and the other a new suitor! As decision time draws near, what moves will our girls make?