huke, okabe rintarou, science adventure, steins;gate, steins;gate: my darling's embrace, game cg, highres, official art, 1boy, beard stubble, black hair, butler, cup, dimples of venus, enbutlered, facial hair, formal clothes, gears, holding, holding<, long sleeves, looking to the side, male focus, mars symbol, messy hair, necktie, nervous sweating, open mouth, pants, short hair, solo, stubble, suit, sweat, tray, white background