One day, the Wada family (including their neighbour Hana) arrived at the airport to catch up with the air flight to Hawaii for vacation.

Unfortunately, Katsu, the youngest of the Taiko drum duo, slips on a banana peel and crashes into a wall, knocking him out unconscious in the process. As he wakes up, Katsu finds out that he missed the flight and Don and the others have already left for Hawaii without him.

He thinks forward about what can he do while no one is at home as he feels lonely before he settled on something: to become the top popularity star of the (singular) street.

How will Katsu do to accomplish this? By befriends the animals around the street!