The perspective is a bit messy in the first few chapters, but the later chapters are basically the focus.
Really crazy, affectionate, fake cold demon king x fake cynical, heartthrob, immortal monk
I am a time-traveler, and I have become the adopted son of the Demon Lord, even though I look like the deceased Immortal Lord.
One day
Me: "Although, I don't think it's shameful to eat meal replacements."
I said this when the Demon Lord looked at my face with sadness for the Nth time.
Demon Lord: "No, you don't understand. It's different."
His voice was soft.
I rarely asked forcefully: "Then what kind of person is he? How much do I look like him?"
The Demon Lord was silent for a while.
"It's very similar, but he has left. I only want him and I only love him."
What a top love brain! I thought a little hard.
Many years ago
Demon Lord said: The world is boring.
The immortal smiled lightly and answered: That's why you always come to provoke me.
Demon Lord: Immortal Lord, this is meaningless. If Lang had no intention, how could I dare to do anything rashly?
Purpose: Love is seen in the details