Nitro+CHiRAL is a subsidiary of the Japanese visual novel company Nitroplus that focuses on creating BL eroge visual novels. The company was formed in 2004 and released their first work, Togainu no Chi, in 2005. Their second game, Lamento: Beyond the Void was released in 2006. Their third game, named Chiral Mori and released in 2008, is an amusement disc that includes three minigames and features the characters of their first two games. While Togainu no Chi and Lamento were adult games, Chiral Mori was given an approval for all ages. Their fourth game, Sweet Pool, was also released in 2008 for adults only. During the same year, Togainu no Chi was re-released on PlayStation 2 for ages 15+, called Togainu no Chi: True Blood.
In 2010, Togainu no Chi was ported to the PSP handheld consoles as Togainu no Chi: True Blood Portable. Nitro+CHiRAL released their fifth game, DRAMAtical Murder, in 2012. A fan disc of DRAMAtical Murder called DRAMAtical Murder re:connect, featuring additional scenes and songs, was released in 2013. A 15+ PlayStation Vita port of the game called DRAMAtical Murder re:code was released in 2014. In 2015, Togainu no Chi was ported to iPhone and Android devices; both versions are based on the PlayStation 2 port for ages 15+.
In 2016, Nitro+CHiRAL re-released Togainu no Chi, Lamento: Beyond the Void and Sweet Pool for the Windows 10 operating system. The company has announced a sixth game called Slow Damage. As of now, none of Nitro+CHiRAL's video games have been localized in English.