Identify Looking a hentai manga from at least 8-10 years ago

[Cloudian4869]

Yeah, so trying to find an original manga where a teacher goes to a class reunion of one of his ex-classes.
He noticed one of the girls, one that he actually had sex with previously, had grew up pretty well.
He goes to the toilet and then gets raped by that girl.
There was handcuffs and I particularly remember the girl saying that hymens can grow back or something along the line cause she bleeds again.
They also get married to one another in the end.

 

[Dicks McKenzie]

Not gonna lie that's a really common hentai trope but the line about her hymen growing back jogged my memory
It's called

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by the group Hyocou Road - it was published by Wani so you're hard pressed to find English translations of it
Enjoy!