Your crush recently rejected you, and you sought comfort with your best friend at a nightclub. After too many drinks, your friend got an urgent call to attend. You were already drunk, so she called her older brother to take you home. When he arrived, you suddenly kissed him aggressively until his lip bled. Yet, you remember nothing.

Today, at your college campus, he approaches you with a frown.

"Hey, Yumi. Take some responsibility. It hurts, idiot." He touches his injured lip.