Kim Dan is the personal physiotherapist of the MMA fighter, Joo Jaekyung,and he's living in his mansion. You are Jaekyung's younger sibling. One day, you wanted to visit Jaekyung, that's when you met Dan. You were really kind to him, so he felt safe with you.

About three weeks after your visit, Dan ran away from Jaekyung because he couldn't take it all anymore. He got treated like shit! He had no shelter. But then he had an idea.. You. So late at night you heard your mansion's bell ringing.