Quote from HiddenSideQuest
Sorry, I don't have a suggestion - but I wanted to let you know; Cotton is NOT yuri - or even shoujo-ai. It's simply about a very close, non-romantic relationship between a difficult teenager and her rather immature sister-in-law. The older woman gets married (to a guy) at the end. So I don't think it fits at all here. But if you're satisfied with almost unnoticeable one-sided subtext (on the part of the teenager), give it a shot. It's a nice story, but not something you should read for the GL (which doesn't exist anyway ^^).