In this intimate romantic drama, a college student finds himself caught in an increasingly complicated web of relationships when his childhood friend unexpectedly moves into his apartment. The series follows the daily life of Kazushi Sudou, a seemingly ordinary young man whose quiet existence is turned upside down by the arrival of Ayane, a close friend from his past. As they navigate the challenges of sharing close quarters, their long-standing friendship begins to blur into something more complex and passionate. The story deepens when Ayane's younger sister, Kotone, also enters the picture, creating a tense love triangle that tests everyone's emotional boundaries. With its focus on forbidden desires and the consequences of acting on hidden feelings, this show explores the delicate balance between friendship, loyalty, and burgeoning romance. The series maintains a sensual and dramatic tone throughout, examining how proximity and shared history can reignite dormant emotions, leading characters to question their own hearts and the nature of their connections.