kiri (lwp01 lav), kagamine len, kagamine rin, adolescence (vocaloid), vocaloid, bad id, bad pixiv id, 1boy, 1girl, barefoot, blonde hair, blue eyes, blush, brother and sister, clothed sex, girl on top, hair ornament, hairclip, hetero, hug, incest, one eye closed, panties, panties around leg, sex, short hair, siblings, straddling, tears, text focus, twincest, twins, underwear, upright straddle, vaginal, wince, wink