Isekai Harem Monogatari 4
Isekai Harem Monogatari / 異世界ハーレム物語
Oikawa Naoki is a student that only lives to masturbate. One day, he suddenly gets summoned to another world by 3 beautiful girls that call him a hero. In this world, his semen increases the combat power of women... can he handle all the attention and sex?