1boy, ass, back, back_focus, bara, beard, bedroom, boxers, eugen_(granblue_fantasy), eyepatch, facial_hair, feet_out_of_frame, from_behind, granblue_fantasy, greyscale, hair_slicked_back, karipaku, long_hair, looking_at_viewer, looking_away, male_focus, male_underwear, mature_male, monochrome, muscular, muscular_male, mustache, on_bed, sitting, solo, sunlight, thighs, underwear, undressing, window_shade