Rule 34 Dev - 10s 3boys 4koma blush brothers comic facial_hair father_and_son fatherly greyscale headpat hood hoodie looking_at_another looking_down male_focus matsuno_matsuzou matsuno_osomatsu matsuno_todomatsu monochrome multiple_boys mustache osomatsu-kun osomatsu-san osomatsu_(series) siblings smile sweatdrop sweater tearing_up|6805301022