2boys, animal_ears, arknights, ass, back, bara, clothed_male_nude_male, couple, doctor_(arknights), english_text, feet_out_of_frame, from_behind, furry, furry_male, furry_with_non-furry, hinokumo_f, hood, hood_up, interspecies, male_focus, mountain_(arknights), multiple_boys, muscular, muscular_male, nude, reach-around, scar, scar_across_eye, scar_on_face, short_hair, size_difference, tail, tail_grab, tiger_boy, tiger_ears, triceps, white_fur, yaoi