Making Udon With Sakuya's Leftover Bathwater Has Gotta Be Delicious (Touhou Project)

Randomly, Meiling proposes that she and Remilia should sneak into Sakuya while she’s taking a bath, and use her bathwater to boil their udon. Meanwhile, Flan begins to wonder about the “spice” loving someone puts into food and decides to ask Patchouli and Koakuma about it. Soon, the trouble from both of these scenarios make the girls wonder about love.