Worse yet, something is wrong with this school. But as he sneaks in, he gets involved with a insane janitor who seems to have snatched some students into school and viciously beat them to death. The holiday White Day is upon them, which is similar to Valentine's Day, but in Korea (and some other areas in Asia) White Day is the day where boys gives girls chocolate, while Valentine's Day is the day girls give guys chocolate. Being a noble gentleman with a crush, he sneaks into the school at night to plant the diary and chocolates into her desk. A chance encounter leads into her forgetting to pick up her diary. White Day stars a young Korean student who has a crush on a local beauty. The game was incredibly ahead of it's time, using a lot of real-world logic for various actions and puzzles in the game and stirring up an atmosphere that I feel has been unmatched by any other game to this day.
They are incredibly similar in quite a few ways, though I feel White Day still remains far scarier than either of those franchises and pulled off the, 'I'm a defenseless hero hiding in the dark' mechanic far better 10 years before Amnesia came out. I mention those games as I feel Frictional borrowed a lot from the game White Day. Before Amnesia: The Dark Descent and Penumbra, there was White Day.