Yuuta and Naoko had been living together for five years. Though Yuuta remained as kind as ever, they hadn't had sex for over a year, leaving Naoko troubled and emotionally conflicted. One day, she meets Takel, who just moved in next door. After a heated argument with Yuuta, Naoko storms out of the house and goes straight to Takel. He asks about the cause of the fight, then immediately pins her down onto the bed. Though her heart still clings to Yuuta, her body instinctively responds to the desire she's been starved of. This emotional turmoil becomes the catalyst for a deeper, more intense journey.