実家で過ごす侑美（市川由衣）は、夫婦関係にとある問題を抱えていた…。心配になったリコ（与田祐希）は、侑美を矢島模型店へと連れ出してプラモデル作りをすることに。リアルグレード（緻密なパーツ構成）に挑戦したため時間を忘れて没頭していたリコたち、突然現れたのは…なんと侑美の夫だった！
ひょんなことから彼がプラモデル作りに参加したことで、久しぶりに訪れた夫婦二人の時間。そこで初めて明らかになる侑美の心の内とは…
Yumi (Ichikawa Yui), who is spending her time at her parents' house, is having some problems in her marriage... Worried, Riko (Yoda Yuki) takes Yumi to Yajima Model Shop to build a plastic model. Riko and the others lose track of time as they try their hand at making a real grade (a model with intricate parts), when suddenly, someone shows up... it's Yumi's husband! By chance, he joins in on the model building, and the couple spends some time together for the first time in a long time. What is inside Yumi's mind? It's only then that we learn...
