This game is a memory of mine that I constantly remember, it was very hard to find because I played it when I was soo young and didn't even cared for the names of the games I played.
I live in the middle of nowhere Brazil. One day, when I was around maybe 6 years old, my cousin asked me to go with her to the lan house(sort of cyber coffe) to play video games. I think we were the only two girls in there and we decided to pick the game by the box art that we liked the most which was Tenchu. My cousin was faster and picked the girl character first , but I didn't care because the male character looked like my favorite Naruto character - Kakashi. We were instantly hooked on it and played almost every time we went there. But here is the thing, me and my cousin were too young, we didn't understand very much what was going on (we didn't know there was an story mode or even the concept of story mode), so we just played the first mission to collect some sort of parchments, but we didn't see it very well and we called it little boxes -- that was also how we called the game "little boxes game" haha.
I never got back to play the story mode even after growing up, so having this game ported to modern pc would make my life easier and I would have a reason to go back and finish the whole story, maybe even call my cousin and we can play it together again like when we were kids.