As Rena's work in Tokyo became more stable, she and her boyfriend Yuichi returned to her hometown. Due to work pressure, her boyfriend suffered from erectile dysfunction, and the doctor advised them not to rush into sexual activities. As a result, Rena has not been satisfied for a long time. When they returned home, Rena was surprised to find Yuzuru also at home. It turns out that Yuzuru felt depressed and dropped out of the dormitory due to a crush rejection. Rena intended to cheer Yuzuru up but chose the wrong words, making him even sadder. Remembering Yuzuru used to like reading hentai manga with big-breasted characters, Rena decided to let him touch her breasts to lift his spirits. Without much thought, Rena went to Yuzuru's room and allowed him to touch her breasts, but Yuzuru wanted more - he wanted to have sex with her! Despite verbally refusing, deep down Rena felt excited and eager. The pleasure that her boyfriend couldn't provide made Rena forget everything. They secretly engaged in sexual activities all around the house. They even maintained this forbidden relationship even after Rena returned to Tokyo...