Yeah I'll be needing the blood of your firstborn..
But for real, characters like Steph, Sidney and Jester are going to get their H-content through other game systems, mainly the Clubs system which they are all involved in. Sidequests too, there will be more sidequests in the future that feature some of the less appreciated characters. I mean of course theres the lewd events too but that's for like SIDE SIDE characters (though those characters are going to get more content too) so just because a character isn't a 'main' love interest doesnt mean they can't get a substantial amount of content in the future.