My Roommate Stole My ID to Get Married, So I Was Reborn to Punish the Villains

Looking for Infinite-Flow, Lone-Wolf Stories, Entering a Dungeon in the First Wave

Male-oriented with no female lead or female-oriented with no CP, either is fine. It absolutely has to be an infinite-flow novel where the protagonist is among the first group to enter a dungeon. A lone wolf and single protagonist are a must. Please, my reading slump is severe.