Ore dake Haireru Kakushi Dungeon

Noir Stalgia comes from a poor noble family with little influence, and losing a promising job leaves him with few options. A rare ability guides him to a hidden dungeon that only he can enter, where he meets Olivia, a legendary adventurer trapped deep inside. She grants Noir powerful skills that let him create and modify abilities, but using them consumes points he must restore through pleasurable or emotionally rewarding experiences. Armed with talents far beyond his former status, Noir begins reshaping his future, though every advantage comes with a cost he must constantly manage.