One Piece: Seaside System - Chapter 8: Marine Based -

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

A mission for justice that spans across two lifetimes, a fresh beginning that presents a new opportunity to succeed where he once failed. In a time of grave peril for a world on the brink of anarchy, a hero rises like a phoenix from its own ashes to offer a faint glimmer of hope.Armed with his wealth of knowledge and experience from his past life, as well as an almighty cultivation art obtained under mysterious circumstances, Fang Che sets out to exact vengeance on the Church of the Self-Righteous, a blight on the entire continent and the ones that had put an end to his past life.Original blurb:The long night shrouds the world, and the dawn is delayed.Evil descends upon the earth, and living beings suffer.He wanders in the long night, strolling upon the edge of a blade, swaying between the clouds and hell.Igniting the fire of the star soul.Since the long night stretches on, I shall be the ruler of the night.

[Hero of Knights]

I transmigrated into the mobile game that I was holding until my death.

It happened to be a ‘female-oriented’ card game!

Yeohwan, who became the main character in the game, struggled to set up the strongest handsome knights…

“Were you unable to sleep because of the issue of naming the mercenary corps? Any name given by Commander is fine.”

“Naming the mercenary corps…?”

“You were supposed to tell me this morning. Of course, I didn’t wake you up because of that.”

The voice mixed with laughter echoed in his ears, and the system window he had been waiting for appeared in front of Yeohwan, who had a s*upid expression on his face.

[Please name the mercenaries.] [When completed, the game will begin in full.] Ah… How am I supposed to build a knight order with one B-grade card?

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