Sword God in a World of Magic - Chapter 28: Affinity?

Yin Shen’s name is God.

He never thought that one day he would really become a god.

- Description from novelbuddy

The world is terrorized by the powerful Black Witch who has been sealed in the moon. Every ten years, the night of Hexennacht arrives and a chosen witch must battle the Black Witch in hopes of finally defeating her.

As the current decade’s Hexennacht approaches, a mysterious girl named Kagami Kagami arrives and meets Horinouchi Mitsuru, the daughter of the previous Hexennacht representative.

It takes place between Kyoukai Senjou no Horizon and the City Series, two other series by the author.

There was a Senior Brother and a Junior Sister. One of them was transmigrated to this world and had cheats while the other was the reincarnation of a Great Emperor.

Excerpt:“Are you satisfied?” he asked, walking to the fire where she already sat. “Can you yet call yourself the greatest knight?”“Not until I can beat you,” Irene argued.Despite how serious he looked only moments before, he cracked a smile.“But you saved my life,” he insisted.Synopsis:With a second chance given to her after a pathetic ending to a life she didn’t want, Irene Litharion decides that she will follow in her father’s footsteps and become a knight.Waking up in the body of her eleven year old self, she’s reinvigorated to follow her heart. She has the rare blood of ancient warriors in her veins and promises to not turn her back to it anymore.Prepared for the sacrifices she will have to make to live the life she wants, a new challenge is presented when the only way she can become an apprentice knight is to turn her back on femininity altogether. The years she spent being forced to attend etiquette lessons go out the window and instead, daily sword practice takes place.Her father does all he can to get her into the knighthood, but it’s up to her to show her strength and skill to stay in it.However, it’s different than she expects when the Monster War ravages her homeland, she learns the sting of loss, and secrets of her own blood present themselves the more she leans into the thrill of battle.