Sakura, Dokuro and Shizuki are on a school trip where they are asked to draw the scenery, but not without Dokuro harassing him most of the time. After Dokuro and Zakuro are scared of a "monster" they read about in a myth book, they then want (and force) Sakura to join them in the bath.

Sabato's mother informs everyone that Sabato has to return to the future, but Sakura tries to stop her from leaving, thus everyone ends up in a prison cell. Many attempts to escape go very wrong. Dokuro makes Sakura chocolate, shaped of himself, for Valentine's Day. However, she adds a special "binkan sausage" which makes Sakura really "special" and also gives him an allergic reaction. Zansu, Dokuro, and Zakuro then try to help him overcome the allergy, but all are unknown to the fact that Zansu may have a bigger goal in mind.