After a night out on the town while possessed by Urataros, Ryotaro awakes to find himself in the home of a strange woman named Yumi Saitō. As he rushes out of her home, her ex-boyfriend Tomoya Ōbayashi passes by and becomes jealous, feeling that he is the only man for Yumi. He finds Ryotaro's wallet and goes to return it to the Milk Dipper so that he can fight the young man, but is easily distracted and calmed down by Ryotaro's sister Airi. Meanwhile, people associated with anything that plays Vivaldi's The Four Seasons' First Concerto, "Spring", are attacked by the Crow Imagin, who has made a contract with Yumi. After a short battle with the Imagin as Den-O Sword Form, Ryotaro returns home and is confronted by Tomoya, who cause worst something when Ryotaro hasn't retrieved Yumi. Ryotaro will get punched by him and Airi calls him "Ryou-chan!". If he doesn't retrieves her, Tomoya end up explodes her cafe by watching Seigi and Issē's shocked and Airi's screams in horror. When Ryotaro finds her to get her to speak with her ex-boyfriend, they are ambushed by the Crow Imagin, who escapes before Den-O is able to fight back.