Boku Wa Onee-Chan No Omocha

a special collaboration between yoshida morohe and yuzuki ryouta… a gyaru older step-sister and a younger step-brother with communication apprehension!! aonuma aira is a 13-year-old with no romantic or friendly relationships. but one day, due to his parent's remarriage, the high-schooler misa becomes his step-sister! she's a completely unknown entity to him, and gets way too close way too fast. moreover, her hobby is… makeovers? so she starts making him over until he's turned into a pretty girl! what's in store for him after he's become his step-sister's plaything?