I've Got A Mana Processor In A Magic World - Chapter 18: Runesmithing

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

The world has changed, and so have the people.

Mauve Grey is finally getting the treatment she has always wished for, her father even openly calls her his daughter. Could life get any better?However, she knows it is for all the wrong reasons. She is finally useful, no longer just seen as the sin of the king, a lustful night with her as a constant reminder, especially to the queen who can't stand her.As if getting married off isn't bad enough, she is getting married to the evil vampire king. The species that have put them in jeopardy many times over.However, she has no say in the matter as this forced union is a sign that humans and vampires were truly at peace. However, Jael is ruthless and proved to be more than she ever imagined.Will she survive the vampire world considering vampires think humans to be no better than animals? Will she hold out being the Vampire King's new play toy?

A boy born with the potential, so great that it threatend the world's powerhouses itself._____Born amidst chaos and tragedy, Azhrael, the son of the legendary Frost King and Celestial Witch, carries a burden no child should bear. Half of his soul was dormant into another world, while the other half was left sealed, hidden from the prying eyes of those who sought to destroy him.He was a child of immense potential—his very existence threatened gods and shook the balance of power in the world.However in the main story, Azhrael was only an “extra.” A mysterious beautiful boy with snow-white hair and dull grey eyes who exists in the shadow of others, bullied and beaten, unaware of the legacy he carries.That Is Until.