Boku to Sim no Machi - Racing (ボクとしむの街レーシング) is a Nintendo DS game developed by Konami and released in Japan only. It is a racing game in which players race around a town in a car. The game features two different game modes: Time Attack and Race. In Time Attack, players must race to the finish line within the given time limit. In Race mode, players must race against up to five computer-controlled opponents to the finish line. The game also features a Practice Mode in which players can practice and hone their driving skills. The game features a variety of tracks, cars, and items to unlock, as well as a variety of customization options. Boku to Sim no Machi - Racing is a fun and fast-paced racing game for the Nintendo DS.