Hiroki Maeda

山に囲まれた町に住む、17歳の高校二年生・相生あおい。将来の進路を決める大事な時期なのに、受験勉強もせず、暇さえあれば大好きなベースを弾いて音楽漬けの毎日。そんなあおいが心配でしょうがない姉・あかね。二人は、13年前に事故で両親を失った。当時高校三年生だったあかねは恋人との上京を断念して、地元で就職。それ以来、あおいの親代わりになり、二人きりで暮らしてきたのだ。あおいは自分を育てるために、恋愛もせず色んなことをあきらめて生きてきた姉に、負い目を感じていた。姉の人生から自由を奪ってしまったと…。そんなある日。町で開催される音楽祭のゲストに、大物歌手・新渡戸団吉が決定。そのバックミュージシャンとして、ある男の名前が発表された。金室慎之介。あかねのかつての恋人であり、あおいに音楽の楽しさを教えてくれた憧れの人。高校卒業後、東京に出て行ったきり音信不通になっていた慎之介が、ついに帰ってくる…。それを知ったあおいの前に、突然“彼”が現れた。“彼”は、しんの。高校生時代の姿のままで、過去から時間を超えてやって来た18歳の金室慎之介。思わぬ再会から、しんのへの憧れが恋へと変わっていくあおい。一方で、13年ぶりに再会を果たす、あかねと慎之介。せつなくてふしぎな四角関係…過去と現在をつなぐ、「二度目の初恋」が始まる。

Unaired special of “Himouto! Umaru-chan” included with the manga’s tenth compiled volume. Realizing it is Taihei's birthday, Umaru asks Nana for advice on what to do for him. Umaru decides to act like an ideal sister and spend time with Taihei, only to discover that he prefers her the way she is. Later, as the girls begin their summer vacation by going to a swimming pool, Umaru wonders if she should stop putting on an act in front of her friends and reveal that she, Komaru, and UMR are the same person. As Umaru becomes conflicted over what will happen if she tells everyone, her friends assure her that she doesn't need to reveal her secrets if it'd just make her suffer. Relieved by the support of her friends, Umaru makes the decision to continue hiding her secret.

Unaired special of “Himouto! Umaru-chan” included with the manga’s seventh compiled volume. After being tempted by a pillow on the television shopping channel, Umaru has a dream reminding her to appreciate the pillow she has. The next day, Umaru goes with Sylphnford to the convenience store where she tries to win a lottery prize. Later, Umaru and Taihei go wild at a yakiniku restaurant, unaware that Nana is at the next table over. At the start of October, Umaru and Kirie get into the Halloween spirit early, dressing up in costume and trying various pumpkin-based snacks. Afterwards, Umaru decides to fake a fever in order to skip school, only to be overcome by guilt.