Tsukasa had a forbidden love, but that didn't stop him from meeting his dearest one, Rui. they always met at late hours so that no one would see them, but that day it didn't work out. one of the knights, seeing a person from another kingdom, attacked Rui, leaving him no chance of survival.

Tsukasa was suffering all this time, unable to recover from the loss of his love, but he couldn't leave it like that. He managed to go back in time to change his life in the present, saving Rui.