Isekai Harem Monogatari Episode 4 , English
"Jerking off was what I lived for. I'd spend hours to fap at least ten times a day." Is what the young guy said while violently fapping to a glowing magic book that suddenly appeared. This magic book was actually a summoning from another world, where they were hoping to summon a hero to help them with their enemies. According to the legend, the girls just have to drink his semen to gain an enormous amount of power.