Uekusa Chiaki, an architectural modeler whose father is a famous architect, has a habit of traveling around and visiting nostalgic and cute buildings. He updates his SNS often and is quite popular. On the other hand, Haruno Fuji's boyfriend has recently split up with her. Feeling down, she begins exchanging messages on SNS with Chiaki. The two agree to meet up to have lunch at a famous Tokyo building.

27-year-old Eto Kana lives in Tokyo and has never been out of the city before. She used to work as a designer and stay in a company dormitory but moved back to her family home after resigning due to the stress from interpersonal relationships. Meanwhile, Kana’s family gets a call about an elderly granduncle who got injured. She goes to Kyoto where he lives at the request of her worried mother and stays there for several days to take care of him.