Sad Young Goku

Saiyuki Reload & Reload Gunlock:

Here are two drawings from a set. This is Goku in a flashback when he was younger. Goku is imprisoned on the summit of Mt. Gogyou because he is so powerful and dangerous. He stayed there for 500 years. The limiter he wears on his brow is designed to reduce his power, otherwise he loses himself and becomes an extremely powerful demon. He is eventually released by Sanzo.