Satan created 72 children immortal and immune to any injury, unless inflicted by a weapon forged in the fires in hell. Each child was given a weapon and told to fight for their survival. The sole winner will become the new king of hell. Hagino Sin, the child despised most by Satan, escaped the netherworld and tricked a kind-hearted writer into taking him home. The plan backfires and Sin becomes attached to the savior and his friends at school. Sin must fight for his survival and kill his siblings before they kill him. Can he survive without losing his newfound humanity?

Manga was re-serialiazed in Gangan Online.

Two childhood friends Beckman Jouji and Kuranosuke reunite after not having seen each other for a while. Kuranosuke has the power to fly, but only when his best friend is by his side. Unfortunately, Miss Schrodinger has other plans for these two friends... A one-shot that shows the bond between two best friends!