Interstellar Sentinel-Guide: She Is an All-Purpose Sentinel

A coming-of-age story. The female lead is strong at first and even stronger later. All the male leads are pure, with one female lead and multiple male leads. Set in the future, with a sentinel-guide and interstellar setting; most of the worldbuilding is original. The female lead is a sentinel, and there are four male leads.

Some people live in drunken pleasure in Cloud City, while others struggle to survive in Mud City.

In the future, humanity has reached other planets. Strength and wealth determine people's rank: nobles live in Cloud City, while commoners live in Mud City. A barrier keeps the Zerg from entering Cloud City.