6+boys black_hair bound bowl_cut brothers formal heart heart_in_mouth izumi_(milkywhite2) male_focus matsuno_choromatsu matsuno_ichimatsu matsuno_jyushimatsu matsuno_karamatsu matsuno_osomatsu matsuno_todomatsu messy_hair multiple_boys necktie one_eye_closed osomatsu-kun osomatsu-san outside_border protected_link rope sextuplets siblings smile star-shaped_pupils star_(symbol) suit sweatdrop symbol-shaped_pupils tied_up_(nonsexual) translated