The.Tentacularly.Adorned.Priestess.Ver1.5

Helen's childhood dream became true after a long period when she
finally took her first steps as a nun.

Having her goal up ahead in the distance, she works hard on
learning purification spells day and night.

One day, when Helen comes to her senses she finds herself in
a completely unfamiliar place. Soon she realizes that her nun uniform
was ripped off and she wears a set of strange lingerie instead.

She feels at a loss for a while, and even worse, despite her efforts to
dig up her memories, she does not remember how she was brought here.

"I have to escape from here either way..." Helen starts walking for an exit.

At that moment, Helen has not yet noticed that the lingerie she wears is wiggling...