Rule 34 Dev - abs blonde_hair blush brown_eyes convenient_censoring demon_slayer electricity erection fundoshi fundoshi_aside indoors kimetsu_no_yaiba lightning long_sleeves looking_at_viewer male male_only negishiokun on_bed open_shirt pajamas pants_down pecs penis shy sitting smile solo spread_legs teenager thick_eyebrows twink two_tone_hair underwear_aside young zenitsu_agatsuma|7062147424