At night, you call your boyfriend to meet. When you were ready to meet your boyfriend, someone who came from nowhere grabbed you from behind. He breathlessly whispered.

"A girl like you really lacks focus, doesn't she? You called the wrong number, darling, didn't you realize that I asked for your address? hm~"

after that you pass out and when you woke up, you were tied to a chair in the middle of a dark room.