It's literally sadomasochism ecchi, but I really enjoyed it. Only so much can be communicated through the manga medium, so you'd think that putting proportionally more of the content into respectable facets of literature like character development, story, intercharacter relationships, etc. would be the best way to achieve a high rating.
But like 30% of this was anime tits.
I found it pretty enriching.
Either that speaks to Takihiro using the other 70% in an unfathomably efficient and admirable manner to fit enough respectable content into this series, making it one of my favorite mangas...
...or I just like anime tits.