Everything changes for the Ing family when the husband and father is diagnosed with terminal cancer. The mother, who is the main supporter has become more isolated, while the son is no longer certain about his future plans although he has been accepted to study abroad. The conflicted family returns to the father’s hometown for the tomb-sweeping ritual, but his original mountain tomb has been replaced by a newly built hotel.

伊理户水斗（下野纮 配音）和伊理户结女（日高里菜 配音）是就读于同一所初中的同学，两人在读书期间产生了纯洁的感情，然而，在短暂的交往之后，因为一些误会，这段感情最终还是走到尽头。哪知道，当他们再度重逢时，等待着他们的，是即将住进同一屋檐下，以兄妹相称的生活。
原来，水斗的父亲（兴津和幸 配音）决定和结女的母亲（茅野爱衣 配音）再婚，两家人的孩子自然也要住到一起。情绪的推动下，水斗和结女结下了“绝对不把对方当做异性看待”的决定，但现实真的如此简单吗？无数个不经意间的独处时刻，令两个本就对彼此还有感情的孩子逐渐开始在意起对方来。

2016 film directed by Andy Lo