The Heroine is My Stepsister, and I'm her Final Boss - Chapter 19: Humanity.

Some say he is the bad apple in a basket, that he’s rotting everything around him with disgrace and corruption.

Some say he is the biggest scum of the South Zhanbu Continent, that he’s colluding with the dark sects to cheat, steal, and commit all manner of atrocities.

Some say he is the most wanted playboy. “Lock your daughters at home to keep Fang Xing away!”

To all of those people, “That’s right, I am that big rotten apple. Any problem with that?”

This brand of anti-hero is a young orphan with poor prospects and nothing more than the keepsakes of his uncles. He plots, schemes, and orchestrates all manner of villainy in his quest for power and revenge, unafraid to live precariously and make enemies out of those he really should not.

- Description from Novelupdates

Shadow was an assassin with no family, no friends, and no purpose beyond the missions assigned to him. Kidnapped at the age of five and forced to serve a ruthless assassin organization for fifty long years, his life was a series of shadows and bloodshed. On the eve of his fifty-fifth birthday, he completed his final mission with hope in his heart. A hope that freedom and a better life were finally within reach.But that hope was shattered. Betrayed by the very organization he had devoted his life to, Shadow was ruthlessly killed, his decades of loyalty repaid with treachery. As his life slipped away, he swore one thing.“If he had a second chance, he would live life on his terms, unshackled and free”.In the void between life and death, Shadow's soul was met by “Syl”. The enigmatic Shadow Monarch's System. Syl offered him what he craved most. Another chance at life, but in a world far different from his own. Without hesitation, Shadow accepted, eager to grasp the life he was denied.Reborn into a realm of gods, magic, and chaos, Shadow soon learns the truth.He is a Wild Card, a pawn in the gods’ celestial game. Amere source of entertainment for their whims. But Shadow is no ordinary human. With the sarcastic and unpredictable Syl by his side, a glitching system that grants him powers beyond imagination, he embarks on a journey to defy the gods and forge his destiny.

The story revolves around Charles Karino, a Levaamu Empire mercenary aerial pilot who mans the twin seater reconnaissance seaplane Santa Cruz. One day, he receives a preposterous assignment: to fly solo over 12,000 kilometers of enemy waters to protect a girl named Fana del Moral. Fana happens to be the next in line to the empire’s throne and a girl possessing beauty “equal to 5,000 beams of light.”

This is a standalone book. There’s another series under the name “To Aru Hikuushi e no Koiuta” (Love Song for a Certain Pilot) set in the same world, but in a completely different place and with different characters.

– Ulrezaj @ Mazui

Adapted to anime as “The Princess and the Pilot”

Frost is a healer and must use her wits, modern knowledge of medicine and challenge her moral compass in order to survive this world of Eldritch entities born from emotions, folklore, fairy tales, concepts and despair. She was no more than an ordinary man who fell into an unordinary circumstance. Suddenly appearing in a place called the Nexus in a different world from Earth had left him... er... HER curious about what this newfound world is all about. A world of swords, kingdoms and dungeons? Yep. Of races that were thought to be found only in fiction? Oh yeah. Of technologies that far surpass anything seen on Earth? Huh? isn’t that a bit much? At least they’re limited. And of magic that blatantly violates the laws of physics!? Yeah... physics don’t apply here. But her curiosity ended up costing her before she had learned much of the world of Elysia, and she was betrayed by a person she was led to believe she could trust the most. Come join Frost as she tackles Eldritch entities in a strange world far from home. However, this world may be a lot more closer to home than she realizes. *** < Judgement in Progress > The ‘Blessing of the Nexus’, which she had come to call the ‘System’, displayed these words before her wilting eyes. “Judge… ment... I… I came from… Earth… Transported here… turned into… a girl… and now… I’m being… Judged…? < Decision of One Thousand Juries Pending > < Awaiting Verdict > “… If… my only… wrong… is living… then I’d rather… be wrong… to the very end!” When the black forest fused with the darkness behind her eyelids – – A message appeared.