A African prince crashes into suburban Japan with nothing but gratitude and a literal hole to fill. Every favor he returns, another stone drops into that yard, a perfectly dumb visual gag that somehow never stops working across 31 episodes. The joke isn't that he's out of place. It's that he's so earnest about repaying kindness that he turns it into a geometry problem, and the show just lets him keep digging.
An African prince named Urobe hitches a ride on an airplane bound for Japan, seeking adventure in a foreign land. When he arrives unprepared for the harsh winter, he collapses in the yard of a kind-hearted boy named Shishio, who takes him in and nurses him back to health. Grateful beyond words, Urobe, now calling himself Kurobee, makes a vow: he will repay this debt no matter how long it takes. What follows is a series of increasingly chaotic attempts at gratitude. Kurobee devises an unconventional system to track his progress, digging a massive hole in Shishio's yard and dropping a stone into it each time he performs a good deed. The problem is that Kurobee's well-meaning efforts constantly backfire, turning simple acts of kindness into comedic disasters that wreak havoc on the neighborhood. This 1973 comedy mines humor from the clash between Kurobee's earnest heart and his complete inability to function in Japanese society. Expect slapstick chaos, cultural misunderstandings, and the growing question of whether Shishio will ever see his yard again.