My name is You. I have no surname and don't know who my parents are. I'm one of the bottom-dwelling orphans struggling to survive in the slums of Yokohama.
For some unknown reason, after I died, I became the 'guardian spirit' of one of my surviving companions.
I watched him stake everything on revenge, watched him get taken in by the black-haired slime, watched him throw himself into the Black Mafia for the sake of a single word of approval.
I watched that man leave him behind, watched him covered in wounds. I watched him grow up, and watched him die.
After seeing his bones laid to rest, I broke through my limits for the first and only time and gave that black-haired slime the knife he'd always wanted. Then I disappeared.
When I opened my eyes again, I was back before it all began.
He was still alive, and so were our companions. Our little group had just formed, and we had just made a vow: "If one of us is hurt, everyone else will take revenge together."
Past and future intertwine.
This time, let's all live on together.
Personal headcanons: 1. Ryunosuke Akutagawa's relationship with his companions isn't especially close, but it's solid.
2. The timeline begins four years before Dazai picks up Akutagawa. Akutagawa is already known as the "White-Haired Hound," but hasn't yet become obsessed with finding meaning in survival.
Pairing: You x Ryunosuke Akutagawa
Also: 3. You doesn't know the plot. As Akutagawa's 'guardian spirit,' You knows whatever Akutagawa knows, if You is paying attention. If Akutagawa doesn't know something, You doesn't know it either.
4. You is either lawful evil or neutral evil. In the end, both of them will join the □□.
Theme: Love and companionship