He was going too refuse but then she made a comment how he spends all his time at Oka's, so since he usually doesnt refuse women that come at him, and refusing would be uncharacteristic of him he probably agreed, to pacify her and to mitigate the chance of her spreading rumors about them
well that might be it. but it sounds a little tall... he could say no, i’m not good, im tired, i’m going back home, sorry, i’m talking with my friend now, etc., he didn’t even have to mention oka. but he leaves alone with her and does whoever knows what to pacify her? i don’t buy that and his character kinda irritates me bc of this..
i don’t really understand his reasoning, like why tf do you have to go with the girl? someone’s putting a gun to your head?