Flower Master in the City - Chapter 1530

Alvin had planned his future: after leaving the city of Serinthia and obtaining his graduation certificate in technology, he would return to his hometown, stay close to the only girl in his life, and kill a few people from time to time for fun and entertainment.But fate had other plans. On an ordinary day in the Royce Empire—one of the three great empires that ruled this world—the sky split open and a barrage of meteors descended. From that moment, the world changed, and the lands of the empire turned into a battlefield, as monsters appeared and people became hunters.Now, Alvin found himself forced to abandon his former dreams and return to his city before the companion of his life dies.

In a world teeming with Titans, Colossals, Gigantic Monsters and Kaiju's, Erian who reincarnated makes his living collecting scraps of low-grade Defective Genetic Serum, realised he transmigrated along with his system.

Follow Erian as he grows to become the strongest Disaster Grade Titan with the help of his Titan System!

It’s a affair between a loyal dog servant and his master.

- Description from Novelupdates

An angel made a mistake, resulting in Shiihara Daiki’s death. In order to hide the mistake, he was then sent to a different world. The angel will grant him one wish as a payment for keeping it a secret. Daiki asked for a Heavenly Castle floating in the sky without hesitation.

Suddenly a floating castle appeared in the new world, which causes confusion amongst the people. They attempt to contact Daiki in various ways. A country tries to steal it by force, while another seeks to befriend him. What in the world would Daiki do?