After twenty-one-year-old Chiaki watches his boyfriend, Kuon, die in a tragic accident right before his eyes, he wishes desperately to go back and redo it all...and in a miraculous twist of fate, his wish is granted! Chiaki awakens to find himself flung ten years into the past, stuck in a child's body and seeking a lover who doesn't know him. None of that matters, though--as long as he has this chance, Chiaki is determined to reverse the impending tragedy, and he won't stop until Kuon is safe by his side once more...