Uhh... I'm having mixed feelings about this manhua. It has great art and (potentially) great characters, but the way the long-haired girl always makes her partner feel guilty is a bit too much... Her girlfriend deserves much better treatment!
I'm not sure I can agree with that. I mean like someone said earlier, the big difference is that they both seem to be in on the joke. Short-hair acts like the airheaded happy-go-lucky stereotype she's portrayed to be, completed with the "insert-foot-in-mouth stupidity for effectful reactions" normally portrayed by her kind in media. Her more straight-faced girlfriend reacts as planned tsundere-ly by, at times just by calling her a moron and at times by punishing her for being stupid (in an overly dramatic over-reaction for comedic effect). Then they make-up and go on with their life by continuing their silly little dynamics. There's nothing really hurtful about it, specially since short-hair keep coming back for more when she get the reaction she wants.
They're not seriously arguing and being guilt-tripped over things, not even in the seemingly actual argument on page 6. If anything I'd say that long-hair is getting the short stick here, but that's mostly because I think people who have to make humour out of everything are kinda annoying at times.