In this the first two parts of the series Ranmaru is the best fencer in his school. One day while he and his friend, Enjoji, are walking home from school, Yakuza from a rival syndicate try to run his friend over with their car. Ranmaru pushed his friend out of the way and gets hit instead. This event sparks the romance between Ranmaru and Enjoji. A few years later the relationship between them is still strong until Enjoji's half-brother, Kai, shows up and tries to take Ranmaru away from Enjoji. Then Masa, Kai's companion and mentor, shows up to see Kai.

Kizuna

High school life is good for Morifuji Shizuka. With good grades, popularity and a fair share of friends, he is not to be left wanting -- except for one thing. Although the all-important finals are around the corner, the one thing on Shizuka’s mind is his classmate, Ichitaro Sakura. But is this attraction real love, or simply something physical? And what will the innocent-minded Sakura think of another boy having feelings for him?