Legend of Swordsman - Chapter 2: Forming a Supreme Martial Art with the Technique of Absorbing Essence from the Heaven and Earth!

Arthur Reynolds lived as a quiet, compassionate soul who loved to read and workout in his spare time, sacrificed himself to save his family, trading his own life for theirs.In death, his journey was far from over. Reborn into the mystical world of Sylvara as Raegar Blackwood, he discovers a land teeming with Aether, prestigious magic academies, perilous dungeons, and fearsome monsters.Join Raegar as he learns how to harnass his Fusion Magic to become a legend in the making. Witness him conquer dungeons, win tournements and become the strongest.

This is probably the story of a modern man who became the Seventh son of Kangxi in the Qing Dynasty. This is probably the story of how the Seventh brother Yinyou worked hard and fell in love by the way. So there is no doubt that this article is ambiguous, and it is easy to guess who the couple is.

- Description from Novelupdates

As a promise, he went out into the world as an assassin. 3 years later, after becoming the Supreme Assassin, he gave up on everything he had and returned to the ranks of ordinary people. But one day, Kismet, a mystical game created by the National Research and Development had appeared.

Enigmatic hands, spectral frame, and one cunning strike just like the swing of the Grim Reaper. The Supreme Assassin takes on the mystical world, and how his legendary tales sets off, progressively ascending the altar to becoming the best.

- Description from Novelupdates

Xia Yan passed through to the world of Bleach and became an eleven-year-old boy. He was rescued by Renji and Rukia in the Seireitei, and he was studying at Shin’ō Academy, and he was a student of the same class.
He is a top student of the Shin’ō Academy, and he is vying for strength by various teams. In the end, he has entered the first team of secret mobile maneuvers.
He will use punishment to kill every person who tries to threaten the martyrdom and protect his loved one.

- Description from Novelupdates