Shikada Kokonotsu's father owns a rural sweets shop, and his plan is for Kokonotsu to take it over one day. However, Kokonotsu wants to be a manga author instead! One day in summer, the cute but weird girl Shidare Hotaru, from the famous sweets company, comes to pay a visit. Apparently, Kokonotsu's father is famous and she wants him to join her family's company. However, he will only agree if she can convince Kokonotsu to take over the family business!

There is a pun in the title. It can be read “dagashi kashi”: “dagashi” are cheap Japanese sweets that are mainly targeted towards children (as opposed to “wagashi”, which are refined, expensive sweets, served during tea ceremony or given as presents), and “kashi” are sweets in general. It can also be read “da ga shikashi”, which means “however”.