Jinrui Saikyou no Junai

The second instalment of the Saikyou Series.
Aiming for 10,000 metres depth in the deep sea!
Together with the genius psychologist Jikumoto Miyori, Aikawa Jun—a contractor—heads to the bottom of the sea in pursuit of a missing treasure ship and research team. As soon as they arrive, they are besieged by a school of man-eating fish!
(Source: Kodansha, translated)