A special five-day period begins as I'm entrusted with taking care of my childhood friend Yoru while her parents are away on a trip. This responsibility weighs heavily on me, but Yoru acts cold at first—yet she sneaks into my bed at night, saying she's afraid to sleep alone, and asks to bathe together while wearing her school swimsuit, claiming it's too embarrassing to go by herself. Despite her proud and bratty attitude, she shows surprisingly clingy behavior. Her tsundere personality hides genuine concern for me, and beneath her prickly exterior, I sense her desire to grow closer in an intimate way. Through immersive POV footage, these five days unfold into a cohabitation life filled with tension and budding erotic tension—will our relationship take a new turn?