@Luvvolu yepp - otherwise Kashima has no reason to be and no role in the story, and Yacchan has an unresolved grudge with Kashima and him being naturally nice and easy-going person, while Yacchan himself is forcing himself to be like that. I think that would be a lesson about learning how to loose and let go for Yacchan (also they kinda can be a thing with Tamura actually - as that would serve Tamura's character development)