I Was Reborn as a Dungeon Core: From Stone to Sovereign

Riku Tanaka, a man who hated his life, was hit by a truck and died. He was then reborn as a Dungeon Core, a magical entity that controls a dungeon. He was found by a young goblin girl named Fio, who became his Dungeon Familiar. He learned to control his powers and began building his dungeon, summoning monsters and setting traps.



He was attacked by bandits and then by Reaper Scouts, a powerful enemy type. He fought them off using his traps and summoned monsters, but was forced to choose an evolution for his Core. He chose Summoner Core, increasing his monster limit.



He then summoned more monsters and defeated the remaining Reaper Scout, increasing his dungeon level to 3. However, a man in black armor, who was observing Riku's progress, vowed to crush him when he reached his peak.