2boys, abs, animal_ears, arknights, bara, black_male_underwear, blush, book, couple, facial_hair, feet_out_of_frame, furry, furry_male, furry_with_furry, glasses, goatee, graysheartart, grey_fur, hand_on_another's_shoulder, hand_on_another's_stomach, holding, holding_book, large_hands, large_pectorals, male_focus, male_underwear, male_underwear_peek, mountain_(arknights), multiple_boys, muscular, muscular_male, nipples, on_bed, open_book, original, pectoral_pillow, pectorals, reading, scar, scar_across_eye, scar_on_arm, short_hair, sitting, size_difference, stomach, thick_eyebrows, tiger_boy, tiger_ears, topless_male, underwear, white_hair, yaoi