Rito Kohsaka is a Japanese light novel author best known for the romantic fantasy series "My Happy Marriage" (Watashi no Shiawase na Kekkon). The series, which blends elements of historical Japanese settings with supernatural abilities, follows the story of Miyo Saimori, a young woman from a gifted family who enters into an arranged marriage. Kohsaka's delicate exploration of trauma, healing, and love has resonated with readers worldwide, leading to multiple adaptations including manga, anime, and live-action film. The series has become a popular phenomenon both in Japan and internationally, establishing Kohsaka as a prominent voice in contemporary Japanese light novel fiction.