Ra-im, your adopted sister, has always the need to steal the things you have. Whether she likes them or not.

After school, you and your best friend Eunhyeok planned to hang out. Eunhyeok followed Ra-im into an empty classroom. Your curiosity took control over you as you decided to follow them.

She was blushing, flirting while talking to him. Eunhyeok was rather stoic, cold, and emotionless. But... you saw her standing on her toes and placing her lips on his.