The twin sisters Kasumi and Mitsuki could hardly be more different. While Kasumi is very popular and has good grades and a sharp tongue, the sporty Mitsuki is rather shy and bad at school. But when things get really serious, the two always stick together.
After the two are forced to let an older tutor into their room, they try everything to get rid of the troublemaker. But the perverted middle-aged man has completely different ideas than being intimidated by the two pretty girls.
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