Ruby Party (ルビーパーティー, Rubī Pātī) is the Japanese brand name of Koei Tecmo Holdings' women-based game development team.

Therefore, she started to recruit women as staff members, leading to an all-female development group within Koei, forming the Ruby Party team.

[7] Harukanaru Toki no Naka de had become a major hit for Ruby Party, spawning multiple sequels and an anime television series.

2003's La Corda d'Oro had also become an international success for Ruby Party, also spawning multiple anime adaptions and sequels.

Mei Erikawa said that it was a collaborative effort with Nintendo, as it wasn't an otome game, citing their inspiration to be shounen manga, and that the development was challenge for the team, which had never worked in that genre before.