Nagao Kanji works for an advertising agency in his hometown of Ehime Prefecture. He is assigned to the Tokyo sales department where his colleague Akana Rika takes care of his work. One day, Kanji is invited to drinks by Mikami Kenichi, a former classmate from his hometown who is now in Tokyo, and he is also reunited with Sekiguchi Satomi who has feelings for him. However, Rika ends up joining them when she delivers Kanji’s wallet which he had left in office. On the way back, Rika tells him, “Kanchi, shall we kiss?” and he is rattled. There have been rumours in office that Rika is in a relationship with their boss Waga Natsuki.
Fifteen-year-old Sei Saotome is the type of person who tends to fail at the most crucial times. After nearly becoming a high school drop-out, she enrolls into a school that is overambitious for her. There she meets the bold and popular Taiyou Udagawa; and the dreamy and stars obsessed, Mizuki Ootaka. After being asked by Mizuki to join the two guys in the Astronomy Club, it turns out high school life isn't as bad as she had expected.
Ai Morikawa is a hard-working career woman at her job in Tokyo. After a long night at work, she returned home on the last train to find a handsome boy at her door. The 16-year old Nagisa is her sister's stepson, suddenly sent to live with Ai when his parents left for an overseas job. Wary like cats, these two loners 10 years apart in age will have to make a new life together.
