Diary Girl (USA), known in Japan as Koko ni Iru Yo: Koko ni Iruyo (ここにいるよここにいるよ), is a Nintendo DS game developed by Konami. It is a game about a teenage girl who keeps a diary of her daily life. The game is played in the first-person perspective, with the player controlling the protagonist as she goes about her daily life, writing in her diary and making decisions about how to spend her time. The game has multiple endings depending on the decisions the player makes. The game also features mini-games and customization options that allow the player to customize the protagonist's appearance. Diary Girl is an adventure game that offers a unique take on the life of a teenage girl, and is sure to be enjoyed by fans of the genre.