Here is the edited version of your chapter with grammatical corrections:
Moon felt that he could keep kissing the Princess for the rest of his life and never get tired of it. The soft moans and sounds she let out as he sucked on her tongue made his eyes darken. Lustful thoughts filled him with desire.
Would he have the opportunity to hold the person he loved in his arms again? Moon wasn't sure. After all, there were still thirty other men who would be fighting for the Princess's attention. He couldn't be the only one in her eyes, no matter what he did, but he could be the first in her heart. If she liked him the most, surely she would want to spend more time with him.
And that cunning Dragon Rider—he would make sure the Princess never looked Dae's way again! He was much better-looking and had a better temperament than the other. So, at the end of the day, he was a better match for the Princess.
Kira was lost in the cool sensation of lips against hers. The feeling made her light-headed, like she was floating on clouds.
Moon was dressed in layers of clothing, and leaning against him gave her a soft feeling. His hand was on her waist, and she was half-sprawling on his body.
She didn't know how long they made out, but soon she felt slender fingers slowly loosening the rope that held her outer garments together. Kira didn't stop him from undressing her. Moon's eyes were dark as he peeled layer after layer of clothing until he could see clear, smooth skin underneath. The sight of that skin was so tantalizing that he couldn't help but lean forward to place a kiss on her shoulder blade.
"The Princess is so beautiful."
Kira's face grew hot at the compliment. She had no idea what to say. This was the first time someone had complimented her body. Someone like her, who had never even kissed, let alone been with a man—she wasn't familiar with sex. But honestly, who wouldn't want to try? Especially when they had a gorgeous man who treated them like the most valuable treasure.
Maybe this was what she needed to take her mind off her tragic fate. If she never returned home, she would be forced to stay in the palace. So why not find someone to spend her time with? Moon seemed like the best candidate for that.
Moon's kisses left red marks on her neck; it was his way of showing everyone else that he was the only one who had touched her this way. His lips trailed down to her cleavage, and slowly, he lowered himself to his knees in front of her.
"What are you doing?!" Kira asked, her eyes wide. She instinctively clamped her thighs together, her face flushed with both embarrassment and arousal.
Moon smirked. The Princess's expression was very cute at that moment. "Don't worry, I won't hurt you," he said. He placed a hand on her thighs and slowly pried them open.
Kira watched with wide eyes as his head disappeared under her skirt. Soon, she felt a sensation that made her entire body jolt in shock. Her eyes were so red that they might as well have been bleeding. Never before had she experienced anything like this.
It didn't feel bad at all. In fact, she was finding it hard not to lose herself to the immense pleasure. Who would have thought she'd have a handsome man between her legs one day? If Dae found out about this, there was no doubt he'd call her a slut; he might even fire her!
At that moment, the door to the room suddenly opened. Kira didn't have time to react before a figure walked in. She met a pair of dark eyes that first flashed with surprise, then turned cold.
"Interesting," Dae's voice held a bit of mockery and coldness.
Kira snapped out of her daze and squeaked in horror, quickly shuffling back on the bed. In her haste to hide herself, she accidentally kicked Moon a few times. The elf was stunned at the loss of contact. He watched as the Princess buried herself under a mountain of blankets and bedsheets. She was wrapped up like a caterpillar. The sight would have been funny if it weren't for the presence of the other man in the room.
Moon scoffed coldly as he turned to Dae. He straightened his clothes and wiped away the wetness from his lips. "Why are you here?"
"I had something to report to the Princess. I didn't expect to find her busy. Maybe I'll leave and return later. Why don't you two continue what you were doing?"
"Dae-Soon! You're getting very bold! How dare you enter the Princess's chambers without permission?"
"That's rich, coming from you," Dae scoffed, his gaze shifting to the caterpillar-like figure on the bed. "I wonder, did you ask for permission before you came here? Or before you had your face in her—"
"That's enough!" Kira's voice trembled as she spoke. She poked her head out from under the blanket, her face still flushed red. She was too embarrassed to make eye contact with her boss. She'd never been this ashamed in her entire life. "Wh-What did you need to say?"
The Dragon Rider gave her a bored look. "There's something going on in the Moonlight Pavilion. You might want to check it out."
"What?"
Dae left the room without another word. Kira glanced at Moon, who seemed just as confused as she was. What could have happened?
---
No matter how she looked at it, the sight was still gruesome.
Kira fought back the urge to scream in horror; she feared it would only draw attention to herself. But the unconscious (possibly dead) person on the ground wouldn't get up, no matter how much she prayed.
The man was very handsome, appearing to be in his early twenties, with fair skin and long dark hair. He was dressed in the customary white robes that the harem members wore. His striking paleness gave him a "sleeping beauty" kind of vibe. He was drenched from head to toe.
Kira looked from the unmoving body to the dozens of eyes watching her, all waiting to see her reaction. "What the hell happened?!"
"He was being annoying, so I gave him a slight push. Who knew he'd fall into the pool and drown?" The woman—no, Kira knew now that Star was a man who chose to dress otherwise for some reason—looked as nonchalant as the rest. Even Moon, whom Kira had considered competition, seemed unbothered by the scene of death.
The harem was a tough place. Although all the men were treated well, those favored by the Princess ranked higher. That's right, there was even a hierarchy here. And apparently, this deceased young man had been at the very bottom. That explained why no one seemed to care about his sudden death.
Kira covered her mouth with her sleeve. She wanted to scream. How could she forget that this world wasn't like the real world? People here were more heartless and uncaring.
Star, who had been watching the Princess closely, received a death glare from her. Her eyes burned with great disdain. This was bullying someone to death! It reminded her of how Dae had treated her.
"You black-hearted monster!"
"What? Am I black-hearted?" Star seemed genuinely offended by the insult. "You're so worried about this average guy here? You'd insult me for him?"
"Insult you? No, you'd be lucky if that were the end of it. I don't want you here. Get out!"
Kira's words caused murmuring and shocked whispers. Star was one of the Three Lights, the men the Princess cherished the most. Who would have suspected that she would one day chase him away—for a nobody, no less?
Star's eyes darkened, and he exuded a cold aura. Kira sensed the danger and quickly stepped back. "Say it again. Baby, do you really want to send me away?"