Plot: While soaking in the tub, Mafuyu recounts the day at the aquarium where she and Tomo observed a manatee nursing its young when Tomo decides to lighten the ambiance with some horseplay. Guided by another childhood memory of Yuudai Yamanobe showing her his secret base, Mafuyu sets off with Miyuri the next morning to the Tsujidou mansion in order to locate the »Tsar's Crowning« -- the journey thereof no picnic not only because of Miyuri's aristocratic antics but also a trio of helium-wielding Qwasers that accosts the two girls