I Was in the Demon Slayer Corps, but Now I'm a Pirate?

(1v1) The pairing is Ace ₍˄·͈༝·͈˄*₎◞ ̑̑

The writing is average, and the characters may be OOC. Please go easy on me; I'm mainly writing this novel for fun (◦˙▽˙◦)

His name is Tsukimi Xingche. He is the last soul to crawl out of the Demon Slayer Corps' mountain of corpses and sea of blood. After slaying the Demon King, he died of exhaustion, only to open his eyes and find himself falling into a vast blue sea.

The Moby Dick, the Whitebeard Pirates' ship, took in a fourteen-year-old boy covered in wounds and filled with deathly stillness.

Here, someone used the steady blue flames to heal his pain, while someone else melted the ice in his heart with a smile as warm as the sun.

He once thought he was a rootless weed, until the man who ruled the sea reached out to him. “Come be my son!”

When the call of “Little Star” rang out again, as the shadows of his past and the dangers of his present came one after another,

how would Tsukimi Xingche hold on to this hard-won warmth?

And when he gripped his Nichirin Blade once more to protect his new family,

what would burn: the final form of Star Breathing, or the star-like heart that shone for one person alone?