Fall in Love with the Devil for a Hundred Days to Survive

If you ask me what I regret most in my life, I will definitely answer this: "I went to explore the mountains behind the school on a whim because I was interested in campus rumors. As a result, I accidentally awakened the sleeping devil." The Demon King is handsome, has an excellent figure, and has white hair and red eyes that match my XP. But he is a bitch. The day I woke him up, the devil forced me to make a contract and leave a mark, and said that if I didn't want to die, I would fall in love with him within the next hundred days, otherwise the mark would take my life. In order to save my life, I had to place the devil in my home and worked hard to brainwash myself into thinking that we were a couple. However, I accidentally brainwashed him too much and couldn't help but slap the devil when he was sick. When I regained my consciousness, I thought I was going to take a dog. Unexpectedly, the devil in front of me glanced at me and took the initiative to put his other cheek against my palm with a happy expression. "Are you angry? The other side doesn't slap you?" Me: "..." Is this neurosis? Been taught a lesson. * As time goes by, I understand the devil better and better. He is belligerent, hypocritical, cunning, cold-blooded, smooth-tongued, cruel, and duplicitous. His words always make me mad to death. And I always wonder if he has any preferences. For example, he would bring a choker and put the other end of the rope into my hand, lean on my shoulder and call me master, sit on the table and kneel down in front of me... I can't tell when it started. I pretended to fall in love with the devil. When I realized this, there was only one week left before the one hundred day limit. And before I could figure out how to keep the Demon King, I ran into trouble first, and I knew I would die in this trouble. The Demon King does not allow me to hide anything from him, and I have never hidden anything from him, but this time I lied to him and told him that I was participating in a school study tour and might not be back for a long time. I hoped that he could end the game early and remove the mark. The devil agreed to my request, but when I was about to die, he appeared in front of me and saved me. * Since a long time ago, the devil has been waiting for his destined person. That person is the whole meaning of his life. Without her, the devil would rather choose to sleep. Tens of thousands of years passed by, and the Demon King opened his eyes from the darkness and saw for the first time the person he was familiar with and who he had longed for. He laughed softly, stretched out his hand to pull the other person, and left a mark with a kiss. That is not a mark that brings death. With this mark, all the injuries suffered by the other party will be transferred to him. The Demon King finally waited for this human being and would never allow her to die casually. Finally waiting for you. The Demon King's eyes were firmly locked on the human, and he pressed his face against her palm, sighing in his heart. [Even if I only have a hundred days left to live. Tips before reading: ▲HE, HE, HE! ! ! ▲The Demon King is very sick and cannot live without the heroine. Intention: Make progress every day