This is all really quite silly. I wouldn't mind seeing more of Shouko, though; I think they'd make a good combination.
Speaking of which, why do I suddenly get the feeling there's going to be a self-styled "rival" that she seduces, who then becomes a self-styled "apprentice" calling Yurika her master?
Normally, I'd scoff at the very idea. But in this? It's a distinct possibility.