Sorata Kanda, a high school sophomore living in Sakurasou, the den of their academy's problem children, spends his days being dragged around by the strange residents, swearing he's going to escape Sakurasou one day.
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Tora-San returns to Shibamata just before his family leaves on a trip for Kyushu. Later, he encounters an old school chum and begins to have feeling for his artist sister.
When Tora-san returns to visit his family, he is surprised to find an arrogant professor occupying his room. The professor and Tora-san become rivals for the affection of Chiyo.