As An Undead Wizard, I Summon SSS-level Undead Disaster - Chapter 127 - : Professional Direction

Framed for something she did not do which resulted in her only son’s death, she was abandoned by her husband. Reborn after an accident, the eighteen-year-old Ye Tianxin swore to reclaim her life. Then, due to an unexpected twist of fate, she saved the life of a powerful man and her new destiny was rewritten!

This is the story of a boy who lived a secluded life in the mountains, tending his farm, rearing his fish, and dreaming his dreams. Eh? Did I suddenly conquer all worlds and become the big boss? Or am I still in a dream?

- Description from Novelupdates

Crossing to One Piece world, he became Roger’s younger brother.

I opened my eyes to find myself in another world. For some odd reason, I ended up as a sword. Before my eyes laid a plain full of magic beasts, and so, I launched my body and flew in search of a partner, a wielder (females only).