I work at headquarters but am sent for a week to help an underperforming branch. Dreading the tedious assignment, I arrive and unexpectedly reunite with Yuki, the admired senior coworker who trained me when I first joined the company. The ring on her left hand reveals that she is now married, yet she remains as beautiful as ever and stirs up painful old feelings. That night we go drinking for the first time in years. I must have overdone it, because when I come to, I am alone with her in an unfamiliar hotel room...