I Wanted to Climb to Heaven, but It Turned Out That I Was in the Underworld?

A black tower in a small village, Young Silence has seen adulthood since childhood. The sudden arrival of the address exploration team broke the tranquility of the village. With their arrival, the village seemed to have changed. Silence had no choice but to enter the black tower to find a solution. His parents told him to keep climbing, keep climbing, there will be a solution above. Silence doesn't understand. Some people say it's heaven above, some people say it's bliss. What's up there? This is a journey to salvation.