1x16 - Dragon Ball Z: Dragon Box

Gohan, having been caught in a whirlwind and thrown into the sea, washes ashore on a beach, where he is saved by some unfamiliar children. They are orphans, who, having lost their parents, live in an abandoned building, led by the oldest boy, Piegero. They repeatedly reject being institutionalized in an orphanage, but the day after they meet Gohan, everyone except for him and Piegero are caught.