During Ichika's point of view, not only does Minato Sahashi had been kissed in the lips by Musubi more than once. But she also told Minato how she feel about him. Other than that, Musubi also took a bath with Minato on the first episode of the second season as well as sleeping with him during the nighttime. The reason why I asking you this is that Minato Sahashi managed to do things that Ichika wasn't able to do. Well, at least not yet anyway.
Here's my example of Ichika would react once he witness Minato's relationship with Musubi...
Ichika: "It must be nice for a guy like Minato to have someone to be with. I wish I have a girlfriend."
You can say that Minato would inspire Ichika to become a better man as to wanting to understand women's feelings more once he sees "Sekirei" on manga or on tv.