I Ascend to Heaven Alone

Li Taihei, a delivery boy who dropped out of school, accidentally discovered the secret that people can fly in the sky. From then on, every night, he would fly quietly in the night sky of this city full of tall buildings, but he accidentally witnessed a murder case. Out of curiosity, he secretly pursued it all the way, but his identity was accidentally exposed, and he was involved in a terrifying conspiracy, and he gradually saw the darkest criminal network in the city...