What impresses me most is that Karen actually had the guts to do all this, and even say "Haha, who cares what people think?" while getting Miyu to agree to set matching profile pics like that. Whether intentionally or not, she's doing a stellar job subtly feeling out whether Miyu would be open to yuri. So even though it's the same "two girls who secretly love the other but think it's not mutual" concept as countless other yuri manga, it's proceeding at a lightning pace, and that makes it so much more enjoyable.