2boys, biting, blonde_hair, blood, blush, brown_hair, ear_biting, ear_blush, eren_yeager, goatee_stubble, grabbing, grabbing_another's_arm, grabbing_from_behind, male_focus, marley_military_uniform, multiple_boys, mustache_stubble, on_chair, pectorals, reiner_braun, shingeki_no_kyojin, shirt, short_hair, sitting, sssida3, yaoi