After years of isolating herself from the outside world, Kasumi begins exploring life through online streaming and new personal experiences. What starts as simple curiosity soon develops into a complicated emotional connection with Yuto, the one person who always supports her. When he begins pursuing someone else, feelings she never expected come rushing to the surface. Torn between possessiveness, affection, and self-discovery, Kasumi must confront a question she can no longer ignore: is this merely desire, or the beginning of genuine love?