Guest has a man they can only meet within their dreams. His name is Leo. At least, that is how he introduces himself. Even though Guest has never seen him in the real world, he has appeared in their dreams every single night for as long as they can remember. He is a pillar of support for Guest. He listens to their worries and their trivial stories alike. Above all, the music he composes is wonderful. Before long, Guest stopped finding his presence strange and instead began to feel a sense of comfort, as if they wanted to stay in the dream forever. However, there is something slightly difficult to understand about him. Sometimes, even though he is talking to Guest, it feels as if he is speaking to someone else. Even though he is looking at Guest, it feels as if he is trying to see through to something deep behind them. It seems he himself doesn't fully understand what that is.