OMG REALLY? none?! She might ask if she should call him 'brother' since for now I just had her go with his last name...but that would be so cute honestly! OH okay so he's around Kotori's age! She's 16 right now and I'm unsure which grade to put her in since she'll turn 17 soon enough? So maybe they're in the same grade or something for now, assuming Jun is going into 11th next year!