1boy, 2girls, 2koma, asymmetrical_bangs, blue_eyes, blush, brown_hair, comic, cup, drinking, embarrassed, family, father_and_daughter, fertilization, glasses, grey_hair, hair_ornament, hairclip, holding, holding_pointer, husband_and_wife, low_ponytail, mother_and_daughter, multiple_girls, open_mouth, original, ovum, parted_hair, pointer, polka_dot, purple_hair, red_eyes, sex_ed, side_ponytail, sino_sakisaki, speech_bubble, sperm_cell, upper_body, wavy_mouth, x_hair_ornament