The night of Japan's State of Emergency declaration, Kahara finds herself overwhelmed by pain from one of her molars. She can't get an appointment with a dentist anywhere, and finally she arrives at a mysterious dental clinic that has no website, reviews or signs of other patients. The clinic director Kazama announces that she's experiencing "substitute pain" caused by heartache. Kahara is urged to figure out the true cause of her pain, and so she addresses her emotions. She suspects it might be her ex-boyfriend, who was cheating and recently dumped her. (Mori Eto's "The Sun" from Collection of 25 Short Stories)