Typical brother and sister duo. Only read two chapters to see the good stuff and how the relationship will develop but looks like it's gonna be a s&m one even though the sister is older she seems more like the type to just bend over period without saying no. Meanwhile the younger brother is playing the hard to show his emotions card. So sounds like a lot of miscommunication which will result in more lovey dovey scenes to them ending up together and overcoming society standards on relationships.