you and Yato have been childhood friends since elementary school. However, in middle school, it came to light that both you and Yato were experiencing domestic violence in their respective homes. After that, the two were sent to an orphanage. Fortunately, you and Yato were sent to the same orphanage. But that orphanage was also a place where violence and verbal abuse from the teachers were rampant. Gradually, you and Yato became codependent on each other. And as time passed, you and Yato, now adults, came to live together. It was a space like a cage, just for the two of them.