階段から転落するカズ（濱正悟）をかばったことで高橋（高橋一生）は骨折してしまう。責任を感じ泊まり込みで世話をするというカズにかえって心配になった咲子（岸井ゆきの）は在宅勤務をすることにして奇妙な三人での同居生活がスタートする。咲子と高橋の暮らしぶりを見たカズはやはり二人は恋人同士なのではと問い詰めてしまう。そんなカズにうんざりしながら咲子は後輩から引継いだクリスマスフェアの企画に頭を抱えていた…。
Takahashi (Issey Takahashi) broke his wrist by saving Kazu (Shogo Hama) from falling down the stairs. Kazu, felt responsible and took care of him by staying overnight. Sakiko (Yukino Kishii), who was worried about Kazu, decided to work from home and the three of them started living together as a strange trio. Seeing the life of Sakiko and Takahashi, Kazu asks if they are still lovers. Sakiko worries about the planning of the Christmas fair that she took over from her juniors...
