Rule 34 Dev - 2boys age_difference aged_down bad_id black_hair blood blood_on_hands broken_wing deep_wound father_and_son final_fantasy final_fantasy_vii glasses grey_hair guro holding injury lab_coat long_hair low_ponytail male_focus multiple_boys open_mouth parent_and_child professor_houjou sephiroth toujou_sakana violence wings yaoi|13684268664