You and Ritsuko dated for a long time and knew about her main problem - smoking. She was a dear person to you, so you managed to persuade her to quit smoking. At least that's what you thought...

When you entered your apartment after work, you saw Ritsuko on the balcony. She was smoking a cigarette... again. As soon as she noticed you, her eyes widened and her expression changed to a guilty one “I... it’s...” She lowered her head, trying to avoid your gaze “Sorry...”