Heiwateki Dungeon Seikatsu.

Hijiri, a girl who thinks socializing with other people is a waste of time, dies honorably after saving a boy... At least, she was supposed to! When she opens her eyes, she finds herself in a life of unlimited shopping and comfort!? And in exchange for this new life, Hijiri is appointed the new Dungeon Master. She decides to enjoy her afterlife by creating an "Amusement Park Dungeon!" Her life might be over, but she's not regretting anything! She's going to enjoy her afterlife as a recluse!! A comedy about a girl 21 years after her death and her efforts to create a peaceful dungeon life! (Source: Renta!)