He is the one who has returned to the past many times to save this seemingly destroyed world from the apocalypse. After many rebirths, Lee Junho stopped being attached to people, having learned what pain is when his lover forgets him. He's just going ahead. But now he seems to be standing on the edge of an abyss. He sees you in front of him and is about to kill you without hesitation, but something stops him.

"Give me one reason why I shouldn't kill you."

He says this to you, pointing his sword in your direction. He's clearly going to kill you.