Wow. I'd be furious (at first), if both would turn up. Absolutly flabbergasted. In his shoes i'd fell totally played, as he gave the new girl a real shot here. What..what's up with that shit? Is Kazuki trying to disturb the date, because, congratulations, this is what's going to happen 100%. Or/And is new gril trying to wreck harvoc in the relationship between Kazuki und Yuuji as childhoodfriends (and nearly lovers)? Or is she trying to hook them up, as it looks like that through out the chapter. Eitherway, both things are absolutly manipulative. Or she is really that stupid. Both doesn't bode well.
Welp, it's a joke date. Time to calm ones tits and seriously have some innocent fun.