Taki & Natsu sharing wish ribbons is really sweet. They are both striving for the same goal, just in their different sports. So the ribbons will in a way show that they are supporting each even if they aren't together. Though Kyo is right that Taki needed to communicate beforehand about how they were going to handle the situation at school. I doubt Natsu really cared about keeping it a secret.
Poor Taki thought that Natsu was actually mad at her. However, she was actually being very considerate for Taki. Thinking that he liked Hina and Hina raising the suspicions asking if Natsu had a boyfriend. Kind of funny Hina pushing to go for Natsu and Natsu didn't want to intrude on Taki with Hina. Though Taki laughing off what Natsu said regarding liking Hina was cute. It was the first time he was relaxed around her. In fact, when he is like that, their chemistry is great.
I really like the focus on Hina to wrap up the episode. She has a lot of pressure on her despite her silly and lax personality. In truth, she is very hard on herself with her diet and exercise. It really brings out the best attributes from Hina. She is a great friend for Taki.