3boys black_hair cosplay crossdressinging embarrassed full_body idolmaster idolmaster_(classic) idolmaster_cinderella_girls idolmaster_side-m male_focus multiple_boys otonashi_kotori otonashi_kotori_(cosplay) pencil_skirt producer_(idolmaster_anime) producer_(idolmaster_cinderella_girls_anime) producer_(idolmaster_side-m_anime) senkawa_chihiro senkawa_chihiro_(cosplay) shirahata simple_background skirt white_background yamamura_ken yamamura_ken_(cosplay)  2boys alternate_costume blush blush_stickers brown_gloves cosplay costume_switch earmuffs fuyumi_jun gloves hand_on_hip highres idolmaster idolmaster_side-m looking_at_another looking_at_viewer male_focus multiple_boys osusi_anago snowflakes sweatdrop winter_clothes yamamura_ken yamamura_ken_(cosplay)