This anime is about a god tier hacker who is famous as BPS(battle programmer shirase).He lives alone in his apartment and is daily visited by her grand niece Misao who is more like a little sister to him. BPS is hired by different agencies to for cyber security and the way BPS creatively makes use of his hacking abilities to achieve his goals is really entertaining. also the relationship between him and Misao provides cute and charming moments. It was aired in 2003 so the artstyle looks old but it doesn't make the experience bad but instead it gives it a certain kind of charm. Overall a fun watch. 7/10