結婚4年目にして訪れた倦怠期ー。一人寂しい昼間を過ごす妻・あみは、隣家の浪人生・内村に週3回勉強を教えていた。あみは、夢に向かって勉強に励む内村をただただ応援したいだけだったが、その親切心が内村の欲望に火をつけてしまう。そして、同窓会に行く為に久しぶりに口紅を塗るあみ…その帰り、マンションの廊下で内村とぶつかり偶然にも唇が触れてしまう。それ以来、内村の欲望は加速し続けて夫の居ない昼下がりに…。
A period of boredom hits after four years of marriage. Ami, a wife who spends her lonely days alone, tutors Uchimura, a student retaking entrance exams who lives next door, three times a week. Ami just wants to support Uchimura as he studies hard towards his dream, but her kindness ignites Uchimura’s desire. Then, Ami puts on lipstick for the first time in a long while to go to a class reunion… On the way back, she bumps into Uchimura in the hallway of the apartment building and their lips accidentally touch. Since then, Uchimura’s desire continues to accelerate, and in the afternoons when her husband is not around…

– JavGG.net