One Piece: The Template System - Chapter 3: Arlong Pirates

Han Ze’s biggest wish in his life is to have a child. However, in the interstellar era with low fertility value, this wish is very slim, and his life has not been realized at the end of his life.
After his death, due to his obsession, he was bound by the almighty dad system, traveling through different planes to be a father to those children who were in urgent need of help.

Patriarchal Dad (Completed)
Upstart Cheating Dad (Completed)
Abuse Dad (Completed)
Playful Daddy (Completed)
The Last God the Father (Completed)
Father and Father (Completed)
Sick Daddy (Completed)
The troubles of Lord Han (Completed)
……

Content Labels: Ability System Fast Passing Through Books
Search keywords: protagonist: Han Ze ┃ supporting role: many ┃ others:

- Description from novelbuddy

A magical ring and a mighty spirit inside the ring, coupled with a genius who lost his cultivation and got named worthless trash. That’s Xiao Yan, the poor genius. You think Xiao Yan got it bad? Well, you clearly have not met Jing Yan.

Jing Yan was once the shining star of the whole East City. However, his cultivation dropped because of the Universal Ring that was left to him by his dead grandfather. Without anything but the Universal Ring, he will once more rise towards the top and beyond!

He is Jing Yan, The Universal Sword God.

- Description from Novelupdates

The handsome, noble, cold, and ruthless family heir Ignatius Leclair took a liking to the fostered girl Delphine Carter in his home.From then on, the aloof man transformed into a loyal companion, taking care of children, cooking... The entire aristocratic circle was utterly shocked, with everyone envying.Delphine Carter smiled serenely: cunning, energetic, vengeful, a different persona by day and night.[Reading Tips: 1V1, both protagonists are pure, sweet story, the heroine is beautiful.]

[Disclaimer: Gore and Mature Content]Kaiser, an orphan, had left Germany to live with his uncle in Lewis Center, USA. Far from his tragic childhood, he befriended five unconventional boys. Together, they hung out, endured boring classes, and faced rejection from girls. Their ordinary lives took a drastic turn when Ben, one of them, was bitten and turned into a vampire by his crush.The revelations kept coming when Yuki, another member of the group, confessed to being a Zodiac—one of the last hunters tracking down Wunders, malevolent supernatural creatures.Kaiser soon discovered a dark world where all his suspicions turned out to be true… And the Mysterienkult was after him. His mother’s tragic death had not been an accident after all.