1girl :o blue_eyes breasts character_name collarbone commentary_request dated green_eyes green_hair happy_birthday heterochromia holding holding_pen idolmaster idolmaster_cinderella_girls large_breasts long_sleeves marker mole mole_under_eye off_shoulder open_mouth pen pink_background ribbed_sweater senju_(snz0) short_hair simple_background solo sweater takagaki_kaede upper_body