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Class no Gal ga, Nazeka Ore no Gimai to Nakayoku Natta. "Kyou mo Kimi no Ie, Itte Ii?"

Class no Gal ga, Nazeka Ore no Gimai to Nakayoku Natta. "Kyou mo Kimi no Ie, Itte Ii?"

クラスのギャルが、なぜか俺の義妹と仲良くなった。 「今日もキミの家、行っていい?」

Shinji Nagumo, a high school student, has a problem: his step-sister, Tsumugi, who came to live with him for family reasons, is unfriendly. They share a home, but the distance between them remains. One day, Tsumugi brings home a "net friend" who turns out to be Shinji's classmate, the popular gal Yua Takarai.

As the three of them spend time together, Tsumugi begins to open up, and Yua grows unexpectedly close to Shinji, both at school and at home. He finds himself the only one who sees her kind, lonely real self and her domestic side. Yua starts acting like a wife, and Tsumugi, assuming they are lovers, seems happy about it.

Every time Yua comes over, their relationship gradually becomes more real. A warm and sweet romantic comedy about a gal, a step-sister, and the bonds that form under one roof.

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