1boy, 1girl, ahoge, artificial_vagina, bed_sheet, blush, book, bored, closed_mouth, collarbone, cum, emotionless_sex, erection, eyebrows_visible_through_hair, fingernails, greyscale, handjob, hatching_(texture), hetero, holding, holding_book, long_hair, lying, monochrome, multitasking, navel, nipples, no_nose, nude, on_back, open_book, penis, reading, sex_toy, simple_background, sitting, sweat, tenga, twitching, wariza, white_background