Kami nomi zo Shiru Sekai

Keima Katsuragi is legendary at dating simulations, known online as the “God of Conquest” because he can win the heart of any two-dimensional heroine. He has no interest in real girls until he accepts an online challenge without carefully reading the conditions.

A demon named Elsie appears and explains that runaway spirits are hiding inside the hearts of real girls, and the only way to force them out is to fill each emotional gap with love. Keima is now required to apply game expertise to people who do not follow scripts and offer no convenient dialogue choices. With every new “route,” he discovers that the rules of real affection are far messier than anything humans have programmed.