Gensou Shinkou

In an alternate world teeming with monster girls—creatures with powers far surpassing those of humans—a transported individual named Ryo awakens. Ryo possesses a unique ability: a "Charm" skill that forcibly elevates the affection levels of all monster girls towards him. Using this skill, Ryo begins to captivate various monster girls, building a harem as he goes. His ultimate goal? To exact revenge on the fantastical creatures that attacked and wreaked havoc on his home in Japan.