comments are linked to previous chapter for some reason? anyways this is pertaining to chap 51. It looks like the sis wasnt exactly worried that she is going to be envious that Ichikawa has a friend that is of the opposite sex but its because she is worried he's aiming for someone whos out of his league. just the fact she changed tunes after confirming how close ichikawa and Yamada are prove it. aww its more wholesome than I thought.