Gakkou o Tsukurou!! Happy Days: Is the first game in the series to be released in the Playstation 2 console. This simulation titles makes you the principal of a school, placing you in charge of management and renovating the school grounds. You get to decide everything, including the creation of your campus and even the rules of your school. Communication with your students is also important to building a strong environment.

The Gakkou o Tsukurou series places the player in the principal of a school, placing him in charge of management and renovating the school grounds. The player decides everything: The place and the new buildings, the professors, the new places of the school, etc.

The game features 6 different kind of school principals to choose one at the beginning of the game.

A head teacher or school principal (also known as headteacher, headmaster, headmistress or the head, sometimes informally in Scots, the heidie or heedie) is the most senior teacher, leader and manager of a school. In the past, the headmaster or headmistress of a British private school was often the owner of the school or a member of the owning family, and the position often remained in the family for many generations.

The school year in Japan begins in April and classes are held from Monday to either Friday or Saturday, depending on the school. The school year consists of two or three terms, which are separated by short holidays in spring and winter, and a six week long summer break.