On the day he turns eighteen, Chuuya expects absolutely nothing from the soulmate tradition—and honestly prefers it that way. Soulmate strings are inconvenient, dramatic, and definitely not something he wants controlling his life. Then while walking through the city, he brushes past a stranger. A red string appears. The sudden pull forces both of them to stumble and turn around, coming face-to-face with the person fate apparently chose for them. Now Chuuya is left with an impossible question: Was it really just bad luck… or did fate know something he didn’t?