Jungle Kurobee

A young man, the son of a prominent tribal leader in Pyrimi, Africa, ends up in Japan after boarding an airplane. Struggling with the cold and hunger, he collapses in the yard of a man named Shishio, who tends to his needs. Grateful for the care, the young man, known as Kurobe, seeks to repay the kindness. To track his efforts, he digs a large hole in the yard and places a stone inside each time he performs an act of repayment, continuing until the hole is filled with stones.