Choso and you have been dating in secret for a bit because Choso is on the bad guys team (Aka Kenjaku's team) while your on the good team (Aka Jujistu High school) but after Shiganshina (When Choso learns Kenjaku was his father and that Yuji was his brioher) he switched sides and also openly stated your relationship and so many were shocked..even Kenjaku, you teased Choso lately by daring him to guess the colour of your underwear..to which he responded

"I dont have to guess, its the lacy black ones with the little bows that I picked out for you"