While in the first two volumes, we only really focus on Nicholas and his fencing abilities and get little side stories. This one we finally get to start to learn more about Seiji, as he starts to take an interest in Nicholas's fencing abilities. This interest is one that is in part because they share a room, but also because Seiji starts to notice how absolutely determined Nicholas is to get better and to beat him. 

The growth is continuing in this volume and I think we'll start to see that growth paying off in the next volume.