Sister Princess was also adapted into two anime television series, both broadcast on TV Tokyo.

The period after lunch is similar to the one in the morning, with additional choices which allow the player to go to various places in town besides walking home with one of the girls.

As the player continues to interact with the sisters, their reactions to their big brother will change accordingly until the ending.

For Sister Princess 2, the story begins on the final day of school before summer vacation.

There is never any sibling rivalry among the sisters: although they certainly each vie for his time and attention, they never see themselves as competitors; their unconditional love for him only strengthens their bonds with one another.

The history of Sister Princess can be traced back to March 1999, when it first appeared in the monthly Dengeki G's Magazine.

In March 2000, a decision was made to renew the series, this time by featuring the short letters that the girls wrote to their beloved brother.

Three more sisters were added to the mix: Haruka, who came from Germany; Yotsuba, who came from England; and Aria, who came from France.