I sincerely like it but what's their ages again?

Etsuro is 35 and Kyuta is still in high school so something like 16-18 yo.

I want to go with 18, just to be on the safe side, because 16 and 17 looks bad. (⊙…⊙ )

Lol and second cousins don't?

It's not problem in japan.

I might also remind that the age gap is also technically not a problem, because the legal age of consent in Japan in 12. And the legal age of adulthood is 20. So between 16 and 18 it's actually quite the western preconception to think any of the three ages is more or less taboo. Non are approaching adulthood in Japan. All are however legal ages to give concent, as they are as well in the US (depending on the state).

Oddly enough, yes. In my country, it is legally possible to marry your 2nd cousin. ╮(￣▽￣)╭

I know but if we're cousins, age wouldnt matter at that point and since males aren't well accepted either I would put that before age.

But this is yaoi. So clearly the gender doesn't matter. I disregard gender issues when I read yaoi just because. The hierarchy of my issues in yaoi goes like this: rape, physical beating, age, filial relationship.