As Nanao Yusa (23) was cleaning up after the Obon festival, a little boy suddenly appeared before her. It turned out to be her late grandfather, who had missed his chance to return home. Furthermore, a wild ancestor from the Stone Age and a Westernized ancestor born in the Meiji era also make appearances. Nanao, who cherishes her ancestors, decides to spend time with them until the next Obon festival...!? Every day with her innocent ancestors is full of surprises and smiles? At the beach, on a hot spring trip, and at work, a series of hilarious incidents occur!!? A strange and heartwarming ghost comedy begins!