True Martial World - Chapter 56: Siege

It is said that the second daughter of the Yu Family is an Unlucky Star who only appears once in ten years, born with a lowly status and astonishing stupidity.Everyone mocks and bullies her, avoiding her like the plague, except for Master Shi, the famously aloof and distant ice sculpture of the Imperial City, who believes he has found a treasure.The first time Yu Zhi met Shi Wei, she thought he was a cold and abstinent CEO.After spending more time with him, she realized he was actually a paranoid, cunning, possessive, and childish scoundrel.One day, while they were watching an idol drama together, Shi Wei suddenly asked, “Why have you never cried for me?”Yu Zhi replied, “My tear glands aren't very active.”Shi Wei said, “Really?”Later, every night when Yu Zhi was bullied into crying, he would whisper eerily yet contentedly into her ear, “Zhizhi cried for me, I'm so happy.”

“Missus, time to fulfil your duties!” Mu Yuchen demanded as he pulled Xi Xiaye closer with his arms intimately wrapped around her waist.

It was a meticulously planned feast for the powerful. Her fiancé had knelt down on one knee and proposed to her sister instead. Robbed of her right to her inheritance, she was prepared for the Xi family to throw her to the wolves.
As she slipped away from her family that had turned their backs on her, she found him — Mu Yuchen, the low-profile and reserved noble that ruled City Z and led Glory World Corporation.

“Mu Yuchen, let’s get married!” He looked up at her, then suddenly stood up.

“Where are you going?”

“Let’s go. Any later and the civil affairs bureau will be closed.”

- Description from Novelupdates

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”