Akame ga Kill: Starting with Dual Kamui - Chapter 18: The Change in Seryu

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

After being imprisoned in the basement by her mother for ten years, she ended her cruel and tragic life in death when they forced her to hand over the key to the hidden treasure. Getting reborn in her teenage years, she woke up in the bed of that terrible and powerful man. This time, she must take revenge on her enemy, and now she must live.

Ye Qinghan, young master of the powerful Ye Family, gets ostracized when his peerless father meets an unfortunate end. Lacking strength and in a bid to live a Purposeful life, he suffers through the unending ridicule, bullying and torture dealt to him at each turn. However fate is a cruel mistress and offers only pain and misery with no end in sight. Broken, weak and distraught, Ye Qinghan embarks on a journey to usurp the hands of fate and attain strength to protect his own.

Follow Ye Qinghan on his journey fraught with perilous encounters, betrayals and fortune as he seeks to overturn the heavens, defy fate and grasps his destiny in his arms.

- Description from Novelupdates

After a car accident, a modern loving couple, Zhou Ying and Gu Chengrui, both transmigrated through space.

Zhou Ying became a jinx everyone despised and had difficulty getting a full meal.

Gu Chengrui became the son of a wealthy, cold, and violent family.

They hated him and were indifferent to his wife. With no one to love or care for the couple, they made a decision.

They decided to split up from the family!

They were penniless in their new house, which had nothing. But there’s nothing to be afraid of!

They had their interspace and wisdom to get rid of poverty and get rich in minutes! As the days started getting better, trouble came knocking on their door.

The family wanted them to go back to being their mule?

No way! The couple stood united and called them out on it, refusing to go back!

Their old rival, a father-daughter pair, wanted to steal their house?

The couple rolled up their sleeves and clashed with them head-on! After much difficulty, they finally had peace, but then a disaster that happens once every thousand years came…