The back of her shirt identifies her as a person from Kumamoto, which is in Kyuushuu. I'm not good with southerners, so I'm leaving it untranslated, but here's what I can tentatively tell you: In the previous page, the girl stays silent while at college and somewhat avoids engaging with people for extended periods of time, causing her to be friendless. On this page, it is heavily implied that her behavior is a result of her attempting not to use her Southern dialect at all (while on campus). When with this guy named "Ren", she acts like a completely different person and lets her dialect out freely.