A short and sweet escape room puzzle game with an interesting, though not wholly fleshed out plot around it. Having played some of the writer's later works first, I can see how this title was one the first steps in a lot of the themes Uchikoshi further develops and plays with. As it stands, it's a solid story and a good cast, just the overall effect is probably dampened by having played Ai already.

For me, personally, the best part was actually the puzzles which were a nice consistent challenge and only a couple were annoying, but not unsolvable.