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Despite it being mid-winter, Sakuya has invited Yukino, Kanade and Shizuku to a party at her family’s newly constructed indoor pool before it’s opened to the public. So while the snow falls outside, the girls are inside relaxing in bikinis and sipping tropical cocktails – except Kana is far from peaceful. Though she spends half the party attempting to stop Sakuya from staging impromptu photo shoots and photoshopping images of her, all the artistic teen really wants is to spend some quiet time with her sister.
Twins Yukino and Kanade have just arrived in Tokyo ready to head to their new dorm, but their new lodgings are not quite what they were anticipating. While Yuki seems pleased with the convenience of having a grocery store downstairs and is trying to stay positive, her sister is proving far more difficult to please. Concerned at the lack of security and the tiny living quarters, Kana can’t seem to raise any enthusiasm for their new life, so in an attempt to cheer her up, Yuki decides to take her beloved sister on a walk around the city.
The three Minami sisters – Haruka, Kana, and Chiaki – only have each other as they navigate the pitfalls (and pratfalls) of every day life, love and friendships.
Life for the Minami sisters carries on as normal. Chiaki continues to idolize and adore her eldest sister; Kana is as lazy and absent-minded as ever; and Haruka is trying to hold the entire family together. With their apartment acting as a drop-in center for their sensitive and somewhat pathetic uncle, and a friendly hangout for their friends, the trio are never lonely or bored. From getting their fortunes during a new year’s shrine visit, to discussing the recent cup yakisoba phenomenon, or even debating moral dilemmas, no subject is too trivial or too grand for these sisters to handle. No matter what lay ahead for Haruka, Kana, and Chiaki, there will always be room for one more under the kotatsu.
It’s a new year, but little has changed for the Minami household. Chiaki has been given the job of nutritionist for her class's new hamster, and uses the same techniques to care for it that she learned while studying Kanna; Haruka is still suffering from the greatly-exaggerated rumors that she was once a mob boss back in her middle school; and Kanna is as hyperactive as ever, always forcing her friends into awkward situations (including cross-dressing, litter picking and forming an army)! But despite their troubles, the three sisters stick together and always manage to have fun!
Yukino and Kanade are twin sisters who have moved to Tokyo for school and now share a cramped room in their dormitory. Though the pair has always been close, their feelings for each other often seem to be more than simple sisterly love, and no one has ever come between them – that is, until a young girl named Sakuya appears. As the young girl begins following them around and spending more time with Yuki, Kana begins to wonder whether her sister has found a new object of affection. What is Yuki’s real connection with Sakuya and will the sisters’ relationship survive?