Housewife Airi’s life is a rather boring one. As she sorts and washes her daughter Aya’s laundry, she suddenly chances upon some particularly saucy garments of her daughter. Clad in these, wearing make-up and a wig, she leaves the house to go shopping for some limited-time deals. As Airi still has too much time before the sale starts, she decides to spend her free time in a karaoke bar. Following an invitation from Youichi and his friends, she does not need to show her ID, which is very convenient for her. Thus, Airi now has the opportunity to let off steam and for Youichi and his friends this also promises to be a fun ordeal…