Zangyaku Sugiru Isekai demo Suzuki wa Kawaii

Suzuki, a kind-hearted boy, was supposed to lead a slow and easy life in a peaceful isekai world with his "unconditional love from the locals" cheat ability, but the Goddess made a little mistake… He ended up being reincarnated into a bloody post-apocalyptic world where the human race is on the verge of being wiped out by demons, where all sorts of atrocities are possible, including massacres and torture! Suzuki is in big trouble! But for some reason, all the demons who sees him start to act a little strange...!?

(Source: Kadokawa, translated)