Sayo Fukushima (27 years old) is a history woman who can't stop talking when the switch is turned on. She usually hides this switch, but for some reason she can't stop talking about history when she meets Mr. Kato, a boy two years younger than her, whom she met at a company drinking party. Nobunaga's hospitality cuisine, the ranking of restaurants in the Edo period, the sardines that Murasaki Shikibu ate... Their love progresses slowly as they share stories about historical figures and food...! A fluffy story about a girl who loves history and a boy who loves food!