Original Title: Touma's Day Off. Exploding BomberNanimon!
Masaru begs Touma to spend the day with his little sister on her birthday. Touma plans the day, but when they leave, Touma ends up changing most of them because of Chika wanting to do something else. While at the amusement park, BomberNanimon starts attacking. Gaomon digivolves into Gaogamon and kills him.