Seiichi Natsume runs a flower shop called Mellow. He does his favorite job and lives a stable single life. Sometimes, Natsume's sister would send her daughter to him on days when her daughter didn't go to school, and sometimes she would ask the owner of a ramen shop that was on the verge of closing down, Mufan, to help take care of her. Hiromi, the daughter of the owner of a nearby barber shop and a middle school student, has always secretly liked Natsume. There are many customers coming and going in the flower shop. One day, a regular customer, Mariko, confessed her feelings to Seiichi, and Mariko's husband was also there... In this love group comedy, where will their love go?