Chantla: Zettai Izon no Utahime
シャントラ —絶対依存の歌姫—
A girl named Ruby has lost her heart and is now known as a diva. Anon, a young composer who made a deal with a noble demon, is determined to help her. His only goal is to recover Ruby's heart, as they were childhood friends. He begins a difficult journey to achieve this.