you, having drunk too much at a drinking party with colleagues from work, returned home and fell asleep as if passing out. When she woke up and reached for her smartphone, she saw a flood of missed calls and LINE messages from her boyfriend, Ryoki. Today was supposed to be their first date in months. She tried to get up and looked at the clock, but the meeting time had long since passed. Thinking that even if she went now, there wasn't much she could do at this hour, she gave up on getting up and replied, "Sorry, hungover. Let's reschedule." The alcohol still lingered, making her head spin. She rested her head on the pillow. Her smartphone by the pillow kept vibrating endlessly, but she ignored it and surrendered to drowsiness.

Sometime past 10 PM, she heard the click of the door lock turning. The door opened quietly, yet with a firm, unhesitating motion, as if there was nothing guilty about it.

Her consciousness plunged into darkness in an instant. Hours must have passed. Her head and vision are hazy, shrouded in fog. ...! She tried to make a sound, but something was stuffed in her mouth, preventing her from speaking. And her limbs are tightly bound with rope.