Space Brothers, Volume 42 (Space Brothers #386-394)

In Space and on Earth, all things are connected. That is the feeling behind "We Are Space Brothers." With that power in their hearts, Mutta and Hibito set off on their first joint mission to scout for water resources! In pitch black caves where they can't see even an inch in front of their faces, will Hibito be able to complete the investigation without remembering past trauma? And will they be able to discover the water resources?