Naruto System in One Piece - Chapter 12

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

Almond Crowshade was the last surviving human in a dying world whose people failed to conquer the Grand Abyss Labyrinth’s 30th floor in time. The world was getting destroyed, and Almond was the last one challenging the 30th Floor multiple times despite the imminent destruction of the planet. He ultimately defeated the Floor Boss on his dying breath by achieving a true awakening, acquiring an X-rank Trait that signified limitless potential. Alas, he won but there was no home or future for what he fought. But a mysterious figure arrived there, feeling pity and amusement. “This is too precious and fun of a toy to let it rot here. You shall reincarnate and climb up to make things interesting.” [Transfer to another world commencing…] [Your memories will be sealed, and you will reincarnate in another world that has welcomed Grimworld’s tutorial like this one. Clearing each floor of the Grand Abyss Labyrinth will unlock a portion of your memories, until the 10th Floor upon which you will gain your full memories.] ‘I’m giving you a second chance. This time, you must clear the Grimworld’s tutorial and step onto the big game to make things instresting and entertaining.’ [Good luck.]

My motto : Never owe anyone anything .

Now I regret this motto so much cause it brought me a lot of troubles when I accidentally bumped into a demon , Helios .

All enemies fear him ,his wealth is beyond imagination and every woman begs just to get a glimpse of his attention but not me .

I’m just a simple girl who has her mind set on her professional career. Our ways met accidentally and fate kept pushing us in front of each other .

Is this good or bad luck????

His biggest enemy was his aunt, my biggest problem , that ruined my family's peace was my uncle's wife .

I wanted to become someone important , he wanted to get back his title and make his aunt resentful .

Even though we didn't get along we understood that the best way for both of us to get what we wanted was to collaborate .

After we succeed then each one goes on his and her way but he refused to let me go .

At the beginning I thought of it as something easy to handle but little did I know that I was about to be mixed in the royal family issues because of this annoying guy .

His possessive love , sweet like honey has trapped me , pulling me in more troubles than before. I am strong but this attention is too much for me .

Will I ever be able to free myself out of this mess ?

Gawain is dead and was transmigrated, but there was a slight problem during the process.
After floating for more than a hundred thousand years on a different continent, he felt that he might need a body to become a complete transmigrator, but he did not expect that…

- Description from Novelupdates