Responses
in baka updates it says this manga has 2 volumes, so maybe his face is revealed in volume 2?
SPOILER:
and I guess this is him: https://pbs.twimg.com/media/DCLpUy9VwAIg_uW.jpg
(but this is from the raws and you can't really see his face LOL)
so wait we never get to see his face? wtf?