Invited by her trend-sensitive friend Yukari, Mifuyu went to various places. This time, however, she was taken to a happening bar. Unable to hide her bewilderment at the obscene scenes she never encounters in daily life, she fled, but yielded to her friend's strong persuasion and returned to the happening bar... And unwittingly, she ended up having a relationship with a man she met there. Despite knowing it was wrong, Mifuyu finds herself going back to the happening bar. Her husband senses this subtle change and feels an inexplicable anxiety towards her...
