Cause it's hot? IDK
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its cringe. no young handsome man desires to be a "butler" for the few job that exists. its usually very very old traditional or gay men who gravitate to that sort position. there is nothing "masculine" about it.
Actually, in this manga the butler is more of a housekeeper than a butler. I don't think that traditionally butlers were doing all house chores. Maybe that's why you get an impression that it's not very masculine. I honestly don't think that. For many women it's hot when a guy is only focused on them, wearing a suit and treating them like princesses (butler combo). I guess that's what get's them going. ╮(￣▽￣)╭
Butlers exist in the west too. The modern Butler is more privatized. My best friend who lives in Massachusetts is a Butler. She hates it, but she makes some damn good money off of it.
It's a hot dude in fancy clothes that calls you lady and princess. Who wouldn't have a kink for this?
Those that aren't into effeminate men or cosplay.
It's not cosplay bc it's his actual job and I didn't find him effeminate though
I was generalizing about the role itself.
Why do japanese women and society have an fetish when it comes to butlers?
The basically dont even exist in the western world anymore. Apart from the royal in the uk.