Tooru Sekiya, who had been conducting research on 『water』 , was caught up in a summoning and ended up in another world. However, the goddess who had summoned the heroes did not grant him a translation skill. Unable to communicate, Tooru ended up becoming a s*ave. He was subjected to unreasonable violence and even contemplated taking his own life at one point. However, upon learning that he possessed an aptitude for water magic, the man named Tooru began his retaliation.