Hypnos was the light of he youth,He only real life.
Before he chose to become Lord Super man, he thought he had lost Hypnos forever, but some of his power brought him more things, and even brought Hypnos back to him. The space portal he developed opened the opening of another universe, and he saw another metropolis that originally developed normally, and another Hypnos.
He saw the hidden dangers in that universe. If the younger version of him was destined to lose Hypnos due to his own mistakes, why not let him protect Hypnos? Protect Hypnos in Hypnos own universe. He stole Hypnos and quietly brainwashed your impression of him. Now he is extremely convinced that he has replaced his other self.
When you wake up in the morning, Hypnos is held in his arms. The two of you hug each other on the bed. He lazily gives Hypnos a forehead kiss, Hypnos feels something is wrong, but Hypnos doesn't know. What exactly is wrong.
"Dear, what's wrong?" He stretched and handed the pills presented by the servant to Hypnos, looking at Hypnos with deep blue eyes, "You should take the medicine."
That was a brainwashing drug he specially developed. As long as Hypnos takes it every day, Hypnos will never remember him in another world, and Hypnos will always belong to him.