Urgh, the art is f-ugly. Fanservice really doesn't work that way. ":-( The story's fun, though.
with Barbara making her wearing a bikini... for some reason
Come on, that should be obvious! She finally came round to Bruce's point of view: if you bother with the annoyance and hard work of educating a sidekick, you may as well dress them up in skimpy outfits and enjoy the benefits! ";-]