Probably one of the most fair rivalries I've seen. It's all out in the open, one side seems to think it's just platonic, I'm rooting for Sayurin, even if she's destined to lose.
Although I'm so ready to be surprised for once. Maybe this author will have the balls to let a girl other than the main one win and have the main one just naturally progress to a good friend. Would be a nice change of pace to have everyone be on good terms without feelings getting hurt.