Groper Train: Groping the Secret Core: While Shinji is on the train after taking his beloved Caravan for repairs, he notices a woman being groped. The woman, Nana, accepts the man's hand with a blank look on her face. Shinji invites Nana to be his partner in a black-and-white show. He sleeps at the home of his ex-girlfriend Hanae and performs in the tent hut of street vendor Gen-san. Nana's amateurishness is well-received by the audience, and the show continues to be sold out every day. Then, Nana is given an ocarina as a gift by a middle-aged customer, and suddenly disappears...