“Don't go just yet!” The boyfriend tries to stop Miku Abeno from leaving the house. But Miku has her own reasons to leave. Miku tries to leave and her boyfriend prevents it. The situation wasn't going to change. So Miku tells her boyfriend about her secret. “You can't tell anybody about this. But I'm a psychic and I can summon my doppelganger. Succubus!” And here comes a sweet little devil “Aoi” who speaks like a child. The boyfriend wonders: Is this real?