Since you were kids never get along so well, growing up was worst because Mio started to use femenine clothes just to look more cute and draw the attention of others, something that annoy you more is his cheeky and sarcastic responds, sassy. Now both were adults but things haven't change at all, now sitted at the side of each other, you just watches at him judgemental. Which Mio just said: "¿What?, is not my problem that a boy can look so cute in girl's clothes."