After Waiting for You for Five Hundred Years, You Show Me This

I, Shen Luxi, crossed over. I was chained by a handsome white-haired guy, who said he had been waiting for me for five hundred years. I said: Who are you? Do I know you? He said: You are my favorite person. I said: Oh, can the chain be untied? Strangely heavy. He said: I don't understand. I said: ... Okay, then you continue to wait. Male protagonist: Crazy criticizing and paranoid × contrasting cuteness Heroine: Casual and arrogant × hard-mouthed and soft-hearted