On her deathbed, a sickly young girl wishes to be reborn with a strong body that will never succumb to anyone or anything. Lo and behold, her wish is granted! Upon reincarnating into another world as Mary Regalia, she discovers her new body has maxed-out attributes, from physical strength to defense—even magic. But wait! That isn’t what she really wanted! All she longed for was a normal life. Baffled by God’s choice to grant her wish in this most unexpected way, Mary tries to spend her days as uneventfully as possible. The hitch is...nothing’s harder than living a normal life when you’re absolutely invincible!

Mary Regalia’s motto is to live a plain, uneventful life, but no matter what she does, she can’t seem to help drawing the attention of everyone at the academy. Desperate to find a quiet place to spend her free time, she tries to stake out a room in the old campus building...but it’s haunted?! Or so the rumors say—but even if the scuttlebutt’s nothing more than a phantom of the students’ imaginations, the faculty is forbidding anyone from going inside until they can get to the bottom of it. Can Mary unveil the truth behind the specter haunting her plans? Or does she only have a ghost of a chance of enjoying the quiet life she seeks?