10화: 기이한 복장의 소녀가 열세 번째 처녀라고 주장하다
2018년 12월 12일 방영
The 13th maiden was not male... A girl claiming to be the 13th maiden shows up before Itsuki. She sets out to confess her love while wearing an outlandish '80s outfit. However, Itsuki fails to notice, and continues his search. (Source: Conception Wiki)