Responses
http://www.mangago.zone/read-manga/miss_kiryu_doesnt_know_what_love_is/
^Aroace Mc(maybe? She might be demiromantic later on)
http://www.mangago.zone/read-manga/all_about_lust/
^This has a side character who's aroace but its also pretty mature(has sex scenes) so if thats not your thing, then
That's all I know. Sadly I don't think there's any manga that really focuses on this stuff, but I'll try to find more
MC who’s ace and/or aro, and struggles with it before finally accepting it. Thanks :)