Isekai Harem Monogatari - Season 1

A young man engages in a daily ritual of self-gratification. In a parallel realm, the vitality of a hero's essence is the key to empowering female warriors. This man is summoned to that world, where his unique condition is discovered to be of monumental significance. He is identified as the legendary hero whose presence was foretold. The story follows the consequences of his arrival.