Urthotics

An undefeated family of assassins is drawn into a lethal confrontation with mysterious intruders who wield a strange biotic technology known as Urthotics. The conflict blends close-quarters killing techniques with science-fiction body enhancement and an escalating battle over powers neither side fully understands.

Urthotics is a seinen action and science-fiction manga by Fukui Yasutaka. Its central hook is the clash between an elite assassin family and technologically enhanced intruders using the biotic system called Urthotics, creating a grounded yet futuristic battle manga built around lethal skill, body modification and survival.