A Phantom Thief Broke Into My Room, and Now She's Dead Set on Stealing Me!?

Late at night, a woman in black shatters my window and appears: the phantom thief Celis Noir. Knife in hand, I brace myself to hand over my valuables, but the moment she sees my face, she blushes bright red and declares, '...Found you. Tonight's target is you, and it's final.' Wait, she's kidnapping me!? A sweet and dangerous late-night battle of wits in a locked room, between a dangerous intruder and her captive resident!