I'm not sure karaoke was any better use of time than taking the sister and her friend to the beach. But I suppose it couldn't be helped if he had agreed on it earlier with his friends.
@twinklecake My sister says she's bi and she really looks like a stereotypical lesbian. And I don't mean the imaginary hot lesbian girl, but the "butch" + potato nose type of stereotype.
Wait, so he's got a driving license and the girls are middle schoolers? What's their age difference again? Maybe they mentioned it already, I'll go check.
@Nightlilygirl- Big bro looks like he's in university. Google told me you need to be 18 to get a driving license in Japan so he's definitely not a high schooler anymore. So more or less he's 18-19, while sister's friend is 14 top.