At a class reunion, Tsumugi meets a friend she hasn't seen in a while and they start talking about having a baby, so she goes to the obstetrics and gynecology clinic to prepare for the process. The doctor in charge is a bespectacled man who calls himself Usami, and after his examination he hands Tsumugi a painkiller and urges her to take it. Apparently, in rare cases, it can have a side effect of making her drowsy...Ozawa watches her fall into a deep sleep, then devours her limp lips, licks her body, and inserts his cock into her defenseless pussy. All of this happens without her realizing... but the pleasure she felt at that moment remains in her body even after she wakes up...