Touhou Niji Sousaku Doujin Anime: Musou Kakyou Special

After finding Alice Margatroid's doll in the Scarlet Devil Mansion, Marisa Kirisame obliges herself to give it back to its rightful owner. However, in her search for Alice, she stumbles upon Hakugyokurou's gardener Youmu Konpaku and Eientei's moon rabbit Reisen Udongein Inaba fighting over a single watermelon.