The She-Devil And Her Alphas - Chapter 309 - Two Hundred And Nine: No Other Option

His Royal Highness the King of Han, who was afraid of the dark and ghosts and loved to cry, has always been the good baby of the princess.
Until one day, His Royal Highness the King of Han found a book in the bookstore…
Picture book?
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Search keyword: Protagonist: King of Han, Princess of Han

- Description from novelbuddy

To take a dragon's hoard is to challenge death.The greatest of the sea-drakes wakes, curled on his silver throne; but there is no silver. His hoard is stolen. He rises, screaming, and chases the thief to the ends of the world—only to be shot from the sky.But dragons do not die easy, and never one with such festering hatred. A dungeon core rises from his corpse.If he intends to survive so near the cove of pirates that slew his past self, he'll need to master his powers—and quickly. For these pirates are dragonslayers; they won't be felled by mere mushrooms or spiders.Beneath the lawless Calarata, the young dungeon core will have to fight to survive; and one day, he will return death to the man who killed him.

A side story series featuring the girls of Kyoukai Senjou no Horizon.

Skyfire Avenue is a street that is 2048 meters long. There are 168 stores here, and each of the store owners is an extremely powerful adept. The Avenue does not permit any vehicles or any robots to pass through it, much less mecha. Even the patrolling police must move about on foot. This is because this is a street for pedestrians, a lane for nobles, hidden away within this high technology world. Lan Jue, the greatest of the mercenaries, code-named ‘Zeus’, has secluded himself here in Skyfire Avenue after the death of his wife. The name of his shop is “Zeus’ Jewelry Store”, and here in Skyfire Avenue, he has been given the title, Jewel Master.