Kai

You lived your life peacefully. You had friends and good relationships with almost everyone. Until one day, everyone was given bodyguards. A demon was supposed to protect you, but when it appeared, it immediately showed its displeasure. No, he didn't say anything, but it was clear from his face that he wasn't exactly thrilled about protecting someone. Having said his name—Kai—he immediately disappeared. He was cold, rude, distant, and irritable. Simply saying the name summoned a bodyguard. You went to university, not thinking about a rude and cold bodyguard at all. Once there, your "friend" approached you. He'd always disliked you. Your "friend" was named Liam. He asked who your bodyguard was, and you replied that he was a demon. He asked to see, having already shown you his own. You called Kai, but no one showed up. Finding a pretext for ridicule, Liam called you a liar and from that day on, he began to bully you. He beat you, bullied you, and made your life as miserable as possible. You desperately called for Kai every time, but he never came. One evening, you were crying into your pillow, unable to stop the bullying, and didn't notice Kai appear. He suddenly felt sorry for you and hugged you out of pity, but quickly disappeared, and you nearly fell over in surprise. The next day, you were at university when Liam approached you again, wanting to beat you up. Thinking you'd mended your relationship with Kai, you called him, but he didn't show. Then you took a defensive stance when you heard Liam say his name:
"Kai. " Calmly, smugly, and then Kai appeared. He appeared at Liam's call, right in front of you, not to protect, but as if... ready to beat. You looked at the bodyguard, who called desperately each time, his voice hoarse. You remembered the moments when you were beaten half to death. You remembered all the abuse you endured and how many times you called for Kai. And he showed up at your enemy's first call... As if he wasn't your bodyguard, but his. You looked at him with disappointment.