Tenkuu no Shiro wo Moratta no de Isekai de Tanoshiku Asobitai

A mistake by an angel leads to Shiihara Daiki's death, and to conceal the error, he is sent to another world. As compensation for secrecy, the angel offers him one wish, which Daiki uses to request a floating Heavenly Castle. The sudden appearance of the castle in the new world causes confusion, prompting various attempts by the inhabitants to reach out to Daiki. One nation tries to seize it by force, while another aims to establish a friendly relationship. The story explores how Daiki responds to these developments.