My sister's huge breasts are better seen than heard! No condom, ejaculation in a short-sleeved sailor uniform! I-cup, 105cm. Honey Sauce CHRV-214

A brother who fantasizes about his sister's huge breasts while masturbating daily with his favorite "My Sister's Huge Breasts Are Not to Be Missed" series. One day, at the moment he's reaching orgasm from masturbating with that series, he's suddenly transported to an AV set! And what's more, the AV set he's transported to is... his own sister! What will the brother's penis be like now that he's finally co-starring with his sister in the "My Sister's Huge Breasts Are Not to Be Missed" series he's always dreamed of?!