I’m not sure it can be called love at the end, but it is what it is.
Mobius Strip
https://www.mangago.me/read-manga/mobius_strip/
The hate lasted for like 2 seconds, lol…
https://www.mangago.me/read-manga/omerta_1/
Here is another that may fit:
https://www.mangago.me/read-manga/zetsubou_ni_nake/
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