かつて世界を混乱に陥れた大悪魔が美少女の姿で復活—-！
封印を解き目覚めさせたのは、ぼっちのシスターだった！？
コミュ障シスター×大悪魔のイケない契約がはじまる！！
The great demon Anri, who once plunged the world into chaos, has returned in the form of a little girl?! Are we meeting again, my nemesis who sealed me away?! Thus begins an unhealthy contract between a little sister with communication issues and now the demon girl Anri!
