1boy 2girls age_difference ass bald black_hair blonde_hair blush bow chair collarbone cunnilingus eyebrows_visible_through_hair flat_chest hair_bow half-closed_eyes hand_on_another's_head hayashi_naotaka hetero idolmaster idolmaster_cinderella_girls loli long_hair multiple_girls nude open_mouth oral profile sakurai_momoka speech_bubble stylus sweat tachibana_arisu text_focus translation_request trembling white_background