Ranmaru Samejima is a star athlete and serves as the captain of the kendo club. His skills are almost unmatched. Almost. The only person to beat Ranmaru in a match is the president of the tea ceremony club, Kei Enjouji; someone who has no interest in kendo whatsoever. One day after practice, Ranmaru challenges Enjouji to a rematch. Enjouji accepts under one condition: if he wins, they... have sex!? Meanwhile, someone is lurking in the shadows. Kai Sagano has his sights set on Ranmaru, so it's only natural that he loathes Enjouji... but perhaps there's more to Sagano's disdain than meets the eye.

Alt summary:
Three's a crowd. Ranmaru and Kei have a strong and passionate relationship built on years of trust, sacrifice and love. When the mysterious son of a Yakuza boss starts to have designs on Ranmaru's affection, tempers flare, and hidden emotions rise to the surface. Will Ranmaru and Kei's love for each other be able to survive this difficult test, or will the emotional conflict finally come to a head?