Shiteru no, Misete

After getting her underwear mixed up with that of her sexy girlfriend Maika after a wild night, Aoi is enchanted by how good it smells—and ends up doing something a little risque. When Aoi lets the embarrassing secret slip, she expects an angry reaction, but instead, Maika rents out a room for the both of them and demands a reenactment—and she wants to see every last detail!

(Source: Irodori Comics)