"Yuri Eigyou"... I learned a new word.
I felt like the bath scene was reeeeeally forced. And the boob groping? Like it felt way out of character.
I noticed several messages along these lines. It seems a lot of people here aren't getting Yuhi's character at all. She has zero skill at socializing with other schoolgirls and kids her age. She had no idea what to do with Yasumi. So she fell into the standard interaction patterns of mainstream anime, because that was the only reference she could think of. Going together in the bathtub, feeling each other's breasts? That's what girls always do in shows aimed at young males. There was absolutely no hidden intention, no romantic or sexual designs in her actions; she was only trying to make their evening together more eventful for the sake of the show: just a normal get-together between friends, doing stuff that they would be able to talk about on-air. That she kinda screwed up was only to be expected, since she was clueless about these situations in real life.
I guess only when Yasumi asked her if she was aiming for yuri fanservice she realized that she had chosen the wrong approach to the question... but being the arrogant little imp she is, she refused to back up.