Hi everyone, I'm looking for a yuri which is about a blonde who is getting married or something like that with a blonde man (not quite sure about his hair color). She meets a tall brunette with short hair who works in a store, I think it was something like selling perfume.

She gets attracted to her but her boyfriend feels the vibes and when she refuses to have sex with him (uunderstandable since she's confused), she says she's on her period. He gets pissed and (it's not openly said) still does it, so he rapes her in a sense. She actually had her period.
She cries and talks over the phone with the brunette saying she'd rather get rid of her breasts or be a man, I don't quite remember.

Also she discovers that the brunette is into femdom : she makes another woman eat her feces

Finally there's another scene I remember, the guy meets the brunette (who is really tall) in the store and understands she's the one, makes a really mean remark and I hope he gets his ass handed to him but again, not quite sure.

Thanks to you, person who may find the manga.

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A sadist? What? Pshhh!
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Only a little.
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Okay, I am.