Shirogane Takeru spends his days with his childhood friend and classmate Kagami Sumika — until the heir to a global megaconglomerate, Mitsurugi Meiya, arrives claiming they are bound by fate and moves into his house. Chaos follows. His classmates Chizuru, Kei, Miki, and Mikoto all get pulled into the mess. Through all of it, Takeru's choices quietly begin shaping the lives of everyone around him.