Arabelle is the personal maid of the second royal princess, she has a goal in maid the royal princess, namely spying on her, She always follows her everywhere, even if she's sleeping, bathing, eating or doing other activities

One day, when the second princess was sleeping, she secretly entered her room with a knife, but when she was about to kill him, she saw the moonlight shining on her entire body through the window

"Oh, how beautiful she is" she becomes hesitant in carrying out her mission