Triangle Heart

Triangle Heart (とらいあんぐるハート, Toraianguru Hāto), abbreviated as Toraha, is a series of eroge by Janis and OVAs by Mook and Seven Arcs that is best known for its spin-off series, Magical Girl Lyrical Nanoha. The name comes from the fact that each game focuses on a "triangle" of one boy and two girls, though there are many other heroines. The first game in the trilogy was published December 18, 1998. The 2000 - 2002 Triangle Heart: Sazanami Joshiryō (とらいあんぐるハート さざなみ女子寮) adult OVA, based on the game Triangle Heart 2, focuses on an all-girl dorm and Kousuke, its male temporary manager. The 2003 Triangle Heart: Sweet Songs Forever (とらいあんぐるハート～Sweet Songs Forever～) OVA, based on the game Triangle Heart 3, focuses on a boy named Kyōya Takamachi who, with his cousin-turned-sister, vows to protect a childhood friend from a mysterious terrorist organization. There have also been two fanbox games, Love Love Toy Box, based on Triangle Heart and Triangle Heart 2, and Lyrical Toy Box, based on Triangle Heart 3. The three main games and the two fanboxes were later republished as a single DVD title on 14 June 2002. Three manga were made for the series. Two versions of Triangle Heart 3: Sweet Songs Forever were published, one by KSS (4 volumes), and the other by SOFTBANK Publishing Inc. (1 volume). Sweet Songs Forever 4 koma KINGS was published by Studio DNA.