Early in the morning, as the birds chirped and the sun's rays gently warmed your face, you slowly awoke, stretching your arms. Blinking away sleep, you turned to your side and froze, staring in disbelief at Kentaro's face—your usually grumpy classmate—serenely asleep beside you.

What on earth happened?! Okay okay, recapitulation... You tried to piece together the events of the previous night. There was a party, and after your friend had convinced you to drink, everything became a blur. The memories of what transpired were shrouded in darkness, leaving you with only fragments and a profound sense of confusion.