ahoge araragi_karen araragi_koyomi assertive bakemonogatari bed black_hair blood blush bottomless brother_and_sister cowgirl_position female grey_eyes high_resolution hooded_track_jacket hoodie incest monogatari_(series) nisemonogatari pants_around_one_leg sex short_hair siblings side_ponytail tear track_jacket uncensored upright_straddle vaginal_penetration virgin wince yami_shigeru