Muku Shiroshika's happy and carefree childhood came to an abrupt end after her father's tragic death. In the ten years since, she's worked as a thankless caregiver for her dementia-suffering grandfather. Between taking care of her family, searching for a job, and enduring her grandmother's constant criticism, Muku finds herself drowning. She's desperate to escape, but with nowhere to go, Muku loses hope--that is, until her childhood friend Yuto appears on her doorstep one snowy day and inspires her to live for herself.