These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Complete Monster: Kuzunoha Shuhei stands out as the most vicious, misogynist bastard around. The leader of the Kitsune Demon Clan who sets his sights on the magical heroine Misao Harada, Shuhei attempts to rape her after disguising himself as her love interest and the leader of the Tengu Clan. After being foiled by Kyo and the rest of the Tengu clan, Shuhei manipulates a member of the snake demon clan into having Kyo poisoned before invading the Tengu territory, before attempting to injure Misao badly to abduct her. Shuhei gleefully states he doesn't care how badly he hurts her as long as he can force her to bear his heir.
YMMV here; cheesecake cover-art aside, there's very few instances of anything that could be realistically called "abuse" within the manga, and the instances that do occur are perpetrated by villanous characters and portrayed as wrong. Sexy—BDSM themes are obviously present in the manga, after all—but wrong.
When a certain Jerk Ass Kyo's brother Sojo ties our heroine up, encases her behind a magic barrier, and then when Kyo breaks through, starts talking about how great it would be to rape, kill, and eat Misao in front of him (not even necessarily in that order!).