結婚してから1年、平穏な生活を送っていた幸村夫婦。ある日のこと、泉希が学生時代のサークルの同窓会に出席することに。夫は心配し1時間おきに送られてくるメール。「そろそろ同窓会終わりそう―」と送られたきた文面を最後に…。泉希は一晩中、夫よりも相性のイイ元カレのチンポを…。

A year into their marriage, the Yukimura couple were living a peaceful life. One day, Izumi decided to attend a reunion of her college club. Her husband, worried, sent her emails every hour. The last message he sent read, "The reunion is almost over…" But Izumi spent the entire night with her ex-boyfriend's penis, which she found more compatible with than her husband's…