ある日ひかりの元に届いた同窓会の招待メール。懐かしさのあまり参加する。やがて飲みなおそうと残った4人でホテルに…

One day, Hikari receives an email inviting her to a class reunion. Overwhelmed by nostalgia, she decides to attend. Later, the remaining four decide to continue drinking and head to a hotel…