
They kissed right after he licked his ass...

https://twofatblokes.com.au/sweet-as-balls/
this would be the chocolate packaging when they make their newly discovered crunchy, sweet chocolate and sell it, oh also guys this manga was an advertisement for selling their chocolate ( if you didn't know ) and the last scenes where the seme licked the ukes ass then gave him a taste is the main selling point.

I'm still in Chapter 19, so I don't really know much. But... Why do I get the feeling that their ancestors didn't end up together but had separate families of their own??? And that's the reason there's a curse??? OMG.

Considering this curse has never been completed before we can determine that the ancestors would have died early so there is a good chance they didnt have time to procreate. Therefore, the cursed descendants are most likely descended from the ancestors' relatives.
That being said it is not impossible that the two originals had offspring somehow but I doubt it since the curse would have caused them to die early.
this all happened because they forgot to say "no homo"
Oh God ! I was reading this manga during class and i laugh so hard when I saw your comment ! Thank you ... XD
That one dislike on your comment tho
I think this is a mistake ... I did it a lot XD And you can't change your vote ...
When you don’t say the magic words, you become gay for real.