Super Grandma Came to Town!

Synopsis

One day, Takuya and Minoru run into an old woman who looks exactly like Gon. Sure enough, she's Gon's grandmother — named "Mitsu." She had a fight with Grandpa and ran off from their home in Shizuoka. Hearing Mitsu is back in town, the Tamadate family's grandmother "Hanae" pays a visit to the Goto liquor shop. As it turns out, the two are longtime rivals: they once vied for the affection of Gon's grandfather, Shotaro.