Known as a serious and kind aunt, Saki has always given neighbors the impression of being calm and sincere, but beneath her composed exterior lies a swirling passion. Her relationship with her son is forbidden—though she pretends to resist on the surface, deep down she follows her desires, secretly building an intimate bond with him. Yet, she finds herself drawn to another man living nearby, torn between longing to pursue a relationship with him and the secret hopes buried within her heart.