Takasugi Onmi (Keiichiro Koyama) is single and has no girlfriend. He maintains a basic life by studying geography. One day, he suddenly becomes the guardian of Kururi (Hiroji Hirasawa), a middle school student who has lost his parents.This is because Kururi's single mother, Onmi's aunt Miya (Mimura Sae), was designated in her will.Wen Si, who works hard but always in vain, and Kururi, who is taciturn but reliable. When the two began to live together, they could not even have a smooth conversation.

During this period, partners in the laboratory, associate professor Xiangshan (Ichikawa Yui) and assistant Kosaka (Ohara Yuno), were also surprised by the contents of the lunch box Kururi made for Onmi.Wen Si started making hamburger meat for tomorrow's Kururi bento. He remembered the beautiful “hidden flavor” and noticed the thoughtfulness contained in Kururi's bento...

In the end, what will be the direction of cohabitation life for two people who have nothing in common?