Nogizaka Haruka no himitsu: Thanks to Nobunaga's suggestion, which failed in his own class, Yuuto's and Haruka's class decides to do a Cosplay Cafe for the Cultural Festival. Needing help with choosing the outfits to use, Yuuto gets Haruka to go to Akihabara with him. While choosing an outfit for the girls to wear, Yuuto and Haruka are forced to hide in the dressing room due to Nobunaga's unexpected arrival. After finally being able to leave, the two find themselves surrounded by Gentou's personal army.