Yuki Nee-chan no Kan-nou Gokko Chapter 21: This sandwich has a stimulating taste.

Vol.4 Chapter 22: Heartbeat under your underwear

First year Highschool boy Shin Yuki stumbles one day upon his naked childhood friend reenacting a sensual novel with an mannequin in an empty classroom.<br>Yukino Kurose, a third year student, loved to reeanact stories with Yuki's help from books when she was a child, to discover how the characters in the story felt.<br>This time she got herself a sensual novel and asks Yuki to help her out with her reenactment again. Otherwise she'll have to find someone else, because mannequins are not enough.<br>After a quick deliberation Yuki decided to help her out, because he doesn't want anyone else to see her naked.

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