On her way home from shopping, Yukie finds herself in trouble when the string on her bag breaks, and is saved by a university student named Kenta who happens to be passing by. Though they are strangers, the middle-aged woman and the young man are somehow drawn to each other and naturally end up together. They are what the world calls an "age gap couple"... and the two are passionately in love. One day, Kenta comes to see Yukie off at her apartment and is confused when he finds a pair of men's shoes at the entrance. Yukie tells Kenta to go home, but...