A Sky of One Color

The Guardians of the Vongola have been murdered one after another. At last, the killer's identity slowly comes to light. It turns out to be Mukuro Rokudo. Mukuro wants to erase the Guardians from Tsuna's side and leave him all to himself, because he simply can't stand any other colors existing near the sky. Furious, Reborn shoots him dead. After the cycle of reincarnation, Mukuro is reborn and transmigrates into the bodies of the Guardians he killed. But he discovers that Tsuna, surrounded by so many people protecting him, isn't as happy as Mukuro imagined. Tsuna says, "Stay with me. I'm so lonely." Where can Mukuro go now? Theme: