1boy, abs, all_fours, armored_titan, arms_behind_head, ass, bara, blonde_hair, exposed_muscle, large_pectorals, lying, male_focus, modeling, muscular, muscular_male, nude_modeling, on_back, pectorals, presenting, reiner_braun, shingeki_no_kyojin, short_hair, sitting, sssida3, titan_(shingeki_no_kyojin)