Dimensional Keeper: All My Skills Are at Level 100 - Chapter 49: A Chance is all I need

He Lang died by his own hands for the sake of his imperial younger brother’s ambition, whom he loved. He was offered to be reborn in exchange for giving up his past romantic feelings. Reborn without the burden of his romantic feelings, he brings with him a manual to new worlds. He wholeheartedly followed the instructions of the manual to complete the tasks, not knowing that the originally slag gong was blackening…
He pleaded to his affectionate Emperor brother to release him, he pleaded to the paranoid prisoner next door, but until the end he remained baffled.
In the end, he discovered that the full name of the manual was – “Slag Shou Cultivating Manual”
Σ (っ ° ° °;) っ!

- Description from Novelupdates

Quinn Winter is a young man from another world. One day, he is suddenly chosen to become the new Demon King. But the Demon Kingdom is in big trouble – it's losing a terrible war against the human kingdom called Gran'le.To help his people, Quinn comes up with a risky plan. He will sneak into Gran'le and learn their secrets. But things don’t go as planned. A powerful noble sponsors him, and he ends up joining Heavenward Academy, the top school for training future heroes.At the Academy, there's a big challenge called the Selection. The best students become Paladins – magic knights who fight demons. Quinn doesn’t want to become a Paladin. He is a demon king! But now, he’s stuck in the Selection… and if he wins, he’ll become the very thing he’s supposed to destroy.He started the day badly. Now, things are getting even worse.

A former sporting rifle shooter genius transforms into the ‘Juvenile Butcher’. While originally supposed to have received the death penalty, he was instead fortunate enough to have entered a secret and highly regarded armed force, throwing himself into the ‘Nirvana Project’.

“Don't deny it. You want it.” Killian said to me, stroking the nape of my neck with his thumb. His face is so close to mine and I forgot to breathe. I gasped when he pushed my dress higher, revealing my thighs to him and let his hands rest between my thighs.I tilted my head to the side to avoid his lustful gaze, penetrating deep into my soul.“Your body craves it.” He said, firing kisses down my neck till his lips touched my hard, naked nipples. That sent shivers down my spine. My body erupted with goosebumps and I exhaled sharply. I want to speak, but I can't. He has that much effect on me. His tongue played with my nipples and I mewled. That felt so good.“You want me as much as I want you.” He whispered with his lips pressed on my skin. I shouldn't be doing this. I know I should stay away from this man but how can I when he invades my thoughts daily? When he's the only one my body wants. It's frustrating because no matter how hard I try, I can't say no to him. And I am this close to making the worst mistake of my life. I swallowed, trying to fathom the words out.His fingers brushed my core and I jerked forward, pressing my body on his.“I don't want you.”“You're lying.” He said, playing with the strap of my thong with a lazy finger. My eyes rolled back in my socket with pleasure. I am lying but he's making it so hard.“We shouldn't be doing this, Killian.” Killian? Do I really have the right to call him that?“Give me one reason why and I won't touch you.”“Because you're my best friend's Fiance.”