I Can See Your Combat Power - Chapter 560 - Five Hundred and Fifty-six: Going to the Appointment

Tristan Lee, a dominant alpha through and through, meets Justin Vincent Alvarez—an omega who has never gotten his first heat in his 22 years of life.A fateful encounter between the two intertwines their fates, making them meet over and over again, just because Tristan helps Justin in his first heat.With the things connecting them together, read how their love story will unfold.The face that I have been longing to see all this time made my heart skip a beat as if I fell in love with him over again.His cat-like icy blue eyes stared at me as if he was looking into my soul, while I felt like I was drowning in them. I was getting sucked in again without any care for what has happened before—for what broke me in thousands of pieces.Just a single look from him made me realize that I still love him after all this time.“Justin…” I called his name. “Yes?” He responded, feigning innocence as if he doesn't know how much that eye contact affected me. He had a different kind of effect in me that no one could ever compare to.I took a deep breath, preparing myself for what I'm about to do.I don't feel hesitant in doing this at all. Instead, I feel nervous that he might reject me.He must have hated me a lot after all that. But I can't afford to lose him again. If I do… I might really lose myself this time.

Fate, a gatekeeper who had been working for the castle, is beset by a few burdens.

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

Humanity had finally ended the war with the Demon Race and sealed them away, forever.However, they now have to face the treat of the Shadow World, an equally dangerous threat to their civilisation under the rule of the Emperor!Facing only misfortune from a young age, Nikolaus Reinhardt never expected anything good to happen to him.But his world completely changed when he awakened as an Ascendant, and accidentally summoned a member of the Demon Race in his house.Just because he messed around with a god damn book!