Boku no Natsuyasumi 4: Seitouchi Shounen Tanteidan, Boku to Himitsu no Chizu

Boku no Natsuyasumi (transl. "My Summer Vacation") is a 2000 adventure video game developed by Millennium Kitchen and published by Sony Computer Entertainment for the PlayStation. It was directed, written, and designed by Kaz Ayabe. The game follows the summer vacation of Boku, a city-dwelling nine-year-old boy who in August 1975 is sent to stay with his extended family in the Japanese countryside for a month. Gameplay takes place in an open-ended environment where the player is free to determine how Boku spends the thirty-one in-game days of his summer vacation, with few set goals or specific obligations of gameplay progression.