A girl wakes up in an unknown world all alone. In this world she sees another girl who is her exact twin. Their names: 328 and 329. There is only running water; no food anywhere. In their search for food, they find a raft to take them beyond this unknown place, but it becomes evident that only one person will be able to board this raft. The annoying buzzing sounds and voices of a winged insect, the craving for food, and the desire to leave will push them to the brink. One of them will snap...

Akai Kiba is an anthology doujinshi, published between 2002 and 2014. It featured many one-shots from Tsutomu Nihei and other famous mangaka (such as the author of Bokurano, No Longer Human, Blade of the Immortal and Dorohedoro). The anthology spanned 9 total volumes and was sold at the Comiket.