
I've read worse.
"Toware no Kusabi - Ochita Reijo wa Bed de kawareru"
http://www.mangago.zone/read-manga/toware_no_kusabi_ochita_reijo_wa_bed_de_kawareru/
Is 1000x more disturbing.
It's perhaps the most disturbed books i have ever read. It makes this one look like a lullaby.

This is definitely not the worst thing I’ve ever read it’s just I went in thinking it was going to be romance and cute because it didn’t say anything in the tags and it really just ruined my mood the more I read it, and I was hoping it would get better so I continued to read it but it just gets worse. It irritated and upset me so much that it brought some really bad emotions up when I was feeling better and now I think it totally messed it up.

The wedding and honey moon got me like wtf?
The people who sanctioned your and sold you into the hell that monster Keisuke put you through the father of Keisuke and her own father (who ran like a coward when Keisuke revealed his plans of whoring his daughter). They act all merry in the end?
The bodyguard gets "jealous" when men chat her up on their honeymoon but he stood by and watched each day without flinching of her being drugged, rapped and humiliated by countless men. Ffs they even had gang bang rape parties and hed didn't do a thing.
I don't know if this happens frequently in Japan where women are expected to be whored out to pay for the debts of the men in their life.
I’ve never been more disgusted by a manga. It should have a tag that says tragedy because it’s a manga I would never have read. And now my already crippling depression is worse, so thank you.