Toshi is just a regular high school student whose parents are almost never home. Luckily, his kind and beautiful neighbor, Yuu-neesan, takes care of him—cooking meals and helping him study. She seems like the perfect older sister figure, but she has one big secret.
Whenever she plays video games, her personality completely changes. She turns into a raging, competitive gamer who’ll do anything to win—even stripping down or losing her temper. Toshi can’t believe how wild she gets when she picks up a controller.
Now, every gaming session with his big sis turns into pure chaos. Will Toshi survive her outrageous antics? Get ready for a hilarious and steamy comedy where gaming brings out a whole new side of Yuu-neesan!
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