Satomi, also known as Sato, and Hinako pool their earnings from part-time work for a special getaway to a nearby inn. As they settle into their room with its inviting hot-spring bath, they engage in lighthearted conversation about their excursion. Surprisingly, the discussion shifts to their relationship status, prompting Sato to suggest a soak in the bath to ease Hinako's mind. What transpires next is a swift and intense turn of events, igniting a fiery passion between them.