A Single Leaf's Theory of Happiness (Prince of Tennis Fan Fiction)

Older woman, younger man: a worldly adult × a middle school student. Multiple storylines and endings. ※ An old work that began in 2008, so please don’t judge it by 2000s standards. The story follows the Prince of Tennis anime, main manga, OVAs, theatrical films, and official booklets. DS games: Prince of Tennis: Driving Smash! Side Genius and Side King; The Prince of Doubles: Girls Be Gracious! and Boys Be Glorious! PS2 games: Prince of Tennis: Sweat and Tears 1 and 2; Rush & Dream; Prince of Tennis: The Prince of Tennis Festival; Prince of Tennis: Heart-Throbbing Wild Survival: Secrets of the Seaside and Mysteries of the Foothills Note: (1) Kagami Azuma and Kagami Musashi are the two protagonists of The Prince of Doubles: Girls Be Gracious! and Boys Be Glorious! They are original game characters from the game, not characters created for this story. (2) Moto Ayaka and Kohinata Tsukiumi (Kohinata Tsugumi) are the protagonists of Heart-Throbbing Wild Survival: Secrets of the Seaside and Mysteries of the Foothills. They are also original game characters, not characters created for this story. Theme: