Zukkoke San Ningumi Kaito X Monogatari (1998)

Zukkoke San Ningumi Kaito X Monogatari 1998 / ズッコケ三人組 怪盗X物語 1998 / Zukoke Threesome Phantom Thief X Story

The story of three children who, in search of pirate treasure, appear in a cave on the outskirts of the city. Soon, a mysterious thief, nicknamed ‟X‟ by the police, starts prowling the city. It quickly becomes clear that the alleged treasure and the robber's appearance in the city have a lot in common. Unexpectedly, the three friends are drawn into a whirlwind of events and become the key to solving both mysteries. (Source: XuongPhim) ~~ Adapted from children book ‟Zukoke Threesome Series‟ by Masamoto Nasu.