After Kaito's sister, Ai, learns about his debt, she has the Gappori Company help her stock up on toilet paper. Whilst at the supermarket, Kaito is challenged to a Hero Battle, but manages to earn a swift victory, even earning the admiration of Ai. Later, Nagare, deciding to test Kaito's strength, challenges him to a match with his rented hero suit, Snipe Sweeper. Nagare gains the upper hand by mopping the arena floor squeaky clean, leaving Kaito unable to use his close combat techniques. However, Kaito's determination to win allows him withstand Nagare's attacks and get close enough to deal the winning blow.