I've Already Become the Overlord, Yet You're Still in College

[Rule-Based Dungeons + Semi-Invincible + Farming + Daily Check-Ins + Single Female Lead] Oh no! At the very start of a rule-based dungeon, Chu Sheng was betrayed by his childhood friend and tricked into going out as a sacrifice, offered to a crazy female ghost to serve as cannon fodder! At the brink of life and death, Chu Sheng awakened the [Daily Stay-at-Home Check-In System], with its check-in location firmly fixed inside this perilous beginner dungeon. If he left the dungeon without permission, all the benefits accumulated from checking in would be completely erased. Chu Sheng neither dared nor was able to leave halfway through! The other participants fought with all their might, seeking only to escape the dungeon alive. Chu Sheng alone did the opposite, staying safely in the dangerous area. Day after day, he completed his check-ins and built up his strength, waiting for the right moment to complete his transformation. While everyone else fought desperately to survive and hurried to flee, he planned to lie low here until the time was ripe, then steamroll the entire dungeon!