Wait...didn't she already take him to a hotel? Why's he letting another woman drag him around, then...and in front of the former woman, no less? Or does he think, perhaps, that she's not interested in him because she fell asleep? If so, brown haired girl needs to step up her game. Also...getting "The Boy is Mine" vibes from this...maybe that's why it had the "Senpai is Mine" title before?
@KuroAnsatsu What we seen from the hotel chapter...brown haired girl has nice assets, too. They're just not as big as dark haired girl's...nor does she flaunt them like she does.