Basically the first volume. Each volume belongs to a different universe. Ayanokouji has a dilemma, not only him but others too. Such decisions can be rash, but when you think patiently about it, it will be clear. A struggle of emotions and a hint of loss, there is a lot to unpack from this story, read to find out what this is about. The themes may surprise you. Hope you guys enjoy. None of the characters belong to me but kinu sensei.