Forming a harem in the guild through a cheat skill that powers up girls through sex!?

Series Follows Our Main Character and His Interactions With His Neighbor Sayuri-san. Raw (JP), Official English

"Can you see me? Hey, you can see me, right? Hey!" Haruki Kobayakawa, the most beautiful girl in school, suddenly became invisible to everyone but me. I tell Kobayakawa — who is starving and haggard with...

Original Web Manga

His harem consists of demi-human girls? I was forced to withdraw from my world to learn magic with an alchemist. While learning, I come upon a moment that only with my eyes could make any girl fall in love.