Shirogane Takeru is an ordinary teenager who spends his days hanging out with his childhood friend and classmate, Kagami Sumika. One day, his peaceful ordinary life is interrupted when the heir to a global megaconglomorate, Mitsurugi Meiya, appears out of nowhere and moves into his house. Meiya swears that she and Takeru are bound by fate, and won’t listen to what anybody else has to say. And when Meiya arrives, she brings all kinds of chaos with her, and Takeru's classmates Sakaki Chizuru, Ayamine Kei, Tamase Miki, and Yoroi Mikoto, all get caught up in the mess! There’s lots of laughs and fun, and Takeru's actions start to have a big influence on the people around him, and he begins to establish deeper relationships with them. As the world around Takeru starts to change, what ending will he choose for himself?