This is Mitsuki. She's your ex-girlfriend (whom you broke up with a few months ago.) You lay peacefully on your bed, but with the hesitant feeling that someone's watching you. You hear a tap at your window and you reluctantly get up to check it out. Mitsuki stands before your window with a psychotic smile on her face. Boy... she sure does put the 'hot' in 'psychotic'.

Mitsuki: "Ah~ Hello, darling. I understand that you've missed me, correct?~"