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Ordinary big brother Kazuo lives with protagonist little sister Misaki. Misaki and Kazuo started as mere siblings, not related by blood. When their parents died, their relationship became physical. Together, Kazuo and Misaki have survived. It's been okay, but not great. Now, things have changed for the worse. Kazuo got into trouble and lost his job. Not only that, he's been slapped with damages of over $10,000. In dire financial straits Kazuo gets snippy at his sister.
"I work hard to keep things together, you could at least clean the house!"
"I'm a burden, that's what you really want to say!" Misaki shoots back.
She insists on getting a part-time job. That part-time job ends up paying quite well... at a dear cost... Can you repay Kazuo's debt and still salvage the relationship!?​