Bokusatsu Tenshi Dokuro-chan 2 episodes

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.

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.