
On the one hand I do understand what you mean, but on the other hand... why do you think an incest yaoi can't have a humorous approach? In my case, I actually do prefer a more sensitive path with this kind of topic, but it didn't keep me from enjoying a funnier approach. I mean, there are a whole lot of fucked up issues in yaoi mangas (with rape seeming to be the most popular one), still people don't complain if the manga takes a different turn of events - even if the uke might have been raped by the seme in the beginning. E.g. Hidoku Shinaide: Masa's raped Nemu countless of times in the first volume, still people love their relationship as it progessed.
I admit that the humour itself in this particular manga is debatable and maybe even kind of over the top, but I think it's hypocritical if people can accept comedy in a manga that started as pure rape (just an example), but if it's about incest it has to be a parody on a sensitive topic.
Really no offence meant, just stating my thoughts on this matter.

I think i understand what you're trying to say. Yeah, i agree with you and personally speaking i don't have much problem if controversial, darker or more serious matters of real life are treated lightly or in a more humorous or funny way in fiction. After all comedy at times tends to draw inspiration from many unpleasant situations. For example, i liked very much Kawaii Akuma by Madarame Hiro where rape is used as a continuous gag. I found that manga hilarious and very entertaining. Same with the manga right here. I found it very funny and i enjoyed reading it. My comment was not meant do diss the manga or say it was not good (generally, i don't have a problem expressing my opinion whether is good or bad, even if offends other people ) but it had to do more with the fact that this particular manga is so far fetched and some situations are so unbelievable and extreme, that personally i can't but think that it must be a parody of some sort of the incest genre. Maybe i'm wrong, i don't know, but all those brother and uncle complexes in here are almost like a caricature of the incest theme, it's like the magaka deliberately tried to create something so outlandish and unreal that only parody can justify it, in my opinion.
On the other, I can understand why you must think people being hypocrites when they enjoy the relationship that started with rape in the manga that you cited (i haven't read it yet) but they seem to have problem with this. I think it has to do with the fact that people are not comfortable with the idea of incest, even if it's fictional, and furthermore i think the story in this manga, though enjoyable, is a bit too complicated and extreme even for those who enjoy incest. Furthermore, whether we like to admit it or not i think we all tend to be biased and hypocritical when it comes to think that we personally are fine with, enjoy or identify with. For example, you will see many people be extremely prejudice and unforgiving toward semes but extremely forgiving and tolerant toward ukes.
Anyway, i hope my rumblings make a sense and you managed to understand what i'm trying to say because english is not my first language and generally i'm not good at expressing myself.
By the way, i'm not taking any offense by you expressing your opinion. This is an open forum and we all have the right to state our opinion about a manga, whether it's good or bad.

"For example, you will see many people be extremely prejudice and unforgiving toward semes but extremely forgiving and tolerant toward ukes."
Except in the case of sex. I've noticed that much prejudice is given towards ukes that have sex with anyone besides the seme, even if it happened years before he even met the seme. But on the other hand, if the seme is shacking up with 10 others while being with the uke, all is forgiven if he apologizes.
I just always found it strange, like, the uke isn't allowed to have a libido, or even someone he possibly loved, before coming to love the seme.

The only case were some people may be not be comfortable with the uke's libido, is when it is extremely high and he is sleeping around while the seme is introduced in the story, which happens awfully lot, unfortunately. Other than that, not many people have a problem if the uke has slept with someone besides the seme. (Take a look at the top rate yaoi and you will see that most of them have extremely sexually experienced ukes, so ....) Also, i really haven't seen many stories were the seme has other lovers when the uke is in the picture, i have seen the opposite a lot though, and i have definitely not seen the readers forgive him that easily just because he apologized.
I have two explanations about the fuckery (literally and figuratively speaking) that is going in the manga. Either the mangaka is trying to parody the incest theme in yaoi, or she was high as a kite when creating this, no offense.