Rule 34 Dev - 1boy abs artist_collaboration bacchikoi! bara beefy biceps big_penis black_eyes blue_hair closed_mouth collarbone dutch_angle erection facial_hair feet_out_of_frame fundoshi fundoshi_aside fundoshi_only game_cg goatee hunk japanese_clothes jerking large_pectorals light_smile looking_at_penis male male_focus male_masturbation male_only manly masturbation mature_male mazjojo mikkoukun muscular muscular_arms muscular_legs muscular_male muscular_thighs navel nipples non-web_source official_art onsen outdoors partially_submerged pectorals penis rock rokushaku_fundoshi short_hair six_pack solo spread_legs tadano_genji teeth testicles thick_arms thick_eyebrows thick_penis thick_thighs topless tough_guy tree uncensored variant_set water white_fundoshi zamius|12955357112