Sono Isekai Harem wa Seiyaku Tsuki. Jii Koui wo Kinshi Sareta Doutei Yuusha no Slow Life summary: One day, high school student Hayato is suddenly transported to another world. In this world, he is given a gift: a versatile skill known as the "Hero's Blessing," a skill only possessed by heroes. However, this skill comes with a certain "restriction"... That means he can no longer masturbate! With no other way to satisfy his sexual desires than to have sex with girls, Hayato encounters various girls from another world. Will Hayato be able to satisfy his sexual urges?! An alternate world x harem fantasy begins!! (Source: MUGENUP, translated)