Ryohei and Misa, a working couple. Ryohei, who often stays home due to remote work, occasionally encounters a beautiful woman in the apartment elevator when he goes out for a change of pace. Her name is Ikka. She lives in the same apartment building and attends the same yoga class as Misa. One day, seeing Ichika at a loss because she had lost her house key, Misa invited her, 'Come to my place until your husband gets back.'
