Kayaki

Hi, I'd like to know the name of a game where you play as a fat protagonist who looks like an otaku because he wears glasses. In the game, you have to chase a schoolgirl in a park and wait for her to go into the restrooms and do things to her without being discovered. The gameplay involves clicking arrows to move to different parts of the park. I'm not sure if I explained it well. P.S.: The game is Japanese because it seems to have been censored.