Lynn Sr. enlists Mr. Grouse to watch over Lily while he and Kotaro go to Cowbella (a music festival dedicated to cowbell music) when the daycare center is closed, and Rita is busy at the dentist's office. Although Lily keeps doing something that caus... (more)es Mr. Grouse to call Lynn Sr. for advice, Lily suddenly starts to see Mr. Grouse as a better father than Lynn Sr. for some reason, prompting the latter to try to prove that he is her real father.