A Slight Smile is Very Charming - A Beauty’s Smile is Also Charming (BL) Part 1 - Living Together

800 years ago, 3000 dimensional gates opened across the entire world. In that moment, it was as if 3000 different colored eyes opened across the world as hordes of monsters swarmed out of these gates like tears.

Some could destroy city walls with one strike; They had bodies the size of a giant and fed on humans

Some latched onto humans, absorbing their bodies’ nutrients and enslaving humans

Some infiltrated the humans’ cities, disguising themselves as normal human beings while feeding upon human blood to sustain themselves.

In a night, the Human race fell to the bottom of the food chain.

The world had turned into a paradise for monsters…

- Description from Novelupdates

Civilization is destroyed and records lost. Only Dudian survives in a cryogenic sleep. Three hundred years later, Dudian wakes up and must become Dean to survive. Who can he trust in this world overrun by monsters without and within?

- Description from Novelupdates

When Shen Xinghui, an ordinary young man, is suddenly transported to a fantastical world, he finds himself surrounded by incredible beings like Beast Man, Dragon Man, and even Demons.Struggling to adapt in a place where the rules of life, magic, and even biology are wildly different, Shen Xinghui must rely on the guidance of Ignatius, a noble Dragon Man.As Shen Xinghui learns about this world’s diverse cultures, powerful magic, and the ever-present mystery of how he arrived, he discovers that he’s not the first outsider to find himself here—and perhaps not the last.With no clear way back home, Shen Xinghui embarks on a journey to the capital of the Cindralith Kingdom, determined to carve out a place for himself in this strange yet wondrous land. Along the way, he uncovers secrets about the world—and himself—that will change his destiny forever.

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”