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. Thus begins an adventure filled with desire and destruction in a world of fantasy. Ryo wields his "Charm" skill to plunge the world into chaos.