A couple, Kaho and Tomoya, announce that they are getting married at a party where their friends have gathered, but it is accidentally revealed that the groom, Tomoya, has had an affair in the past. The two spend time apart that night. The enormous amount of conversation between men and women who are approaching the end of their twenties, a mixture of honesty and pretense, unveils the depths of human relationships that have reached a turning point in their lives.