2boys, arknights, arm_behind_head, bara, blush, covered_nipples, facial_hair, goatee, greyscale, haiki_(tegusu), jacket, large_pectorals, male_focus, medium_hair, monochrome, multiple_boys, muscular, muscular_male, open_clothes, open_jacket, pectoral_cleavage, pectorals, pulled_by_another, shirt, shy, solo_focus, stubble, totter_(arknights), upper_body, yaoi