Matsuri Mizuno has been sickly since childhood and could not do anything he wanted to do. On the verge of death, he was given the "All-Purpose Fisherman" Skill by God, which allows him to "not drown in the sea" and "freely produce fishing gear," and was reincarnated into another world. Using the Skill he was granted, he began his long-awaited Slow Life in a place rich in nature and surrounded by the sea! Around him, a cute white cat, a beautiful Beastman, and a beautiful Elf girl gather, and a Harem is born!? In this world where men have decreased too much, what is required of him...?