Just what Rozzak wrote. Not really into the game. Just there for Yamada. Just because she's on the rebound. Normally she should just go clubbing and not hunt some guy, that might actually be nice, just to play with him. Him being nice to her and famous, so she can stick it to her EX, is the reason why she is there in first place. It's really bad. The twintail might be too young for him and she seems to be emotionally immature, well duh, because she is a kid, but even her reasoning is better then MC's. She's what? 14? Maybe she has a crush on him since she is 10. First love and stuff. And he never had a GF. In another 4 years and she is 18 and things look different then. Of course she is pissed, when some fluzie rolls in and tries to snatch him away, even though she wanted to cash in her prize for years and couldn't, when it just starts to look like she might actually get a chance.
Of course he should just get laid by an adult women instead of waiting passively for that pipsquike.