Margrave's Bastard Son was The Emperor - Chapter 255

With the ability of the King of Silver, the first king in “K”, to be immortal and immortal, he crossed into the world of One Piece. Although he became a Pirate, he did not target One Piece.

His goal is to live freely on the sea, it’s that simple.

- Description from novelbuddy

Year 2056, in a city in the Yuan Jiang Su Jin area. On top of a ruined, shattered six story residential apartment sits a teenager wearing a combat vest, militaristic trousers, and alloyed battle boots. On his back is a hexagonal shield and equipped is a blood-shadow battle knife. He sits there silently on the edge of the roof. At this time, the sparkling sky was shining and there was a refreshing breath within the air that blew towards him. However, there was only silence within the ruined, deserted city, with an occasional howl that makes your heart skip a beat.

- Description from novelupdates

“A modern online novel writer who had been struggling finds themselves transported into the world of One Piece, becoming a 10-year-old child.After a series of events, Ryuen arrives at Cocoyasi Village. The protagonist possesses the Tori Tori no Mi (Bird-Bird Fruit), Mythical Zoan type, Phoenix form.After undergoing a rebirth (Nirvana), the protagonist's transformation no longer involves turning their hands into wings, and the fruit's power becomes even stronger!From the moment they reach Cocoyasi Village, the protagonist and Nami embark on an adventure, traveling from island to island, indulging in food, drink, and fun. Along the way, they also help the poor by taking from the rich, because, after all, Bellmere’s family is still...”

“Dragon-riding” Prince Craft returned to the imperial capital after traveling around. Refraining from his coronation, he received marriage proposals from each country.

Although Craft dislikes marriage, he established the “Bride Training Department” and he will marry the woman who remained at last. If it’s done at all, it’s fascinating!

In front of Craft who volunteered to be the lecturer and the referee of this training department, each lovely and perfect bride appeared one after another!

A positive female pervert-like cousin, a glamorous beast girl, a black-haired swordsman with ponytail, a blond small breasted princess and a tanned and lively girl with big breasts. These 5 girls approach Craft! A expressionless maid and a brave loli halfsister join the tumult, too!

Who does the Dora Prince choose!? How about all of them! This is the start of a harem, romantic and comedy story!!