After Ten Years of Signing in to Advance City, I Came Out of the Mountain

Rogge traveled through time and became a naval soldier at the Navy Headquarters. However, because he failed in the internship trial, he could only enter Impel Down City as a garrison guard. I thought I was going to live this life in tragedy, but I discovered the sign-in system. If I sign in anywhere, I have a chance to get a reward. Sign in on the first floor of the Impel City and get a reward: a god-level finger gun! Sign in on the third floor of the Propulsion City and get the reward: Intermediate Armed Color Haki! Sign in at Magellan's office and get a reward: a body immune to all poisons! Sign in on the sixth floor of the Push City and get the reward: Junior Overlord Color Haki! … With the idea of not going out until he was invincible, Rogge insisted on signing in the city for ten years. Until ten years later. On this day, the battle at the top began. When Luffy and Blackbeard invaded Impel Down, intending to release many vicious and powerful pirates... Rogge finally had to take action! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.