1. Blackmail-Rape-Love
Now tell me, who doesn't like Hidoku Shinaide?! Because this brilliant manga deserves all the love it is getting! A handsome boy sees his oh-so-genius classmate cheating and decided to blackmail him into having sex with him or else the pictures will be leaked. What the?! Absolutely cute! or not.
The way the artist build each character is amazing. A light -hearted manga with a sexy art to top it off! She made you think that Maya is in love with Nemugasa, hence the blackmailing sex. He wants him for his own. A rebel falling in love with a nerd is one heck of a cute plot. But had this happened in real life, Maya would be branded as a blackmailing-gay-rapist and would be in jail by now. Nemugasa's affection for Maya will be a Psychological effect called Stockholm syndrome. Not so cute anymore isn't it?
I can give a lot more of popular BL manga with similar theme (Rape).
2. Teacher-student-relationship
One of the biggest NO NO in real world but taboos seem to be everything in yaoi world. Even though Kaede isn't Rintarou's homeroom teacher he is still his tutor which is almost just the same. I can say that this story is absolutely adorable and needs to be read! Gaaaaah. I'm promoting! Well, anyway, Just like in the Hidoku Shinaide, the author did wonderful job on creating such a heartwarmingly cute manga. Kaede's adoration for Rintarou, and Rintarou's innocence is just perfect but in reality Kaede would go straight to jail and will be prohibited to tutor again.
3. School Sex
What the fuck?! That'll be your first reaction once you've heard someone's had sex in the school premises but we have a lot of that in yaoi manga. Hatsujou Animal characters were even bold enough to have sex at an open field where they can be seen by students from both schools they were attending! Let's not do a reality check because we all know how absurd this is.
4. Incest
Not even going to lie, Not Equal made my morality waver but I got a hold of it. But then again, made me think once more. "They don't have that father and son relationship anyway, it should be okay, right?" Naaaah, morally, it isn't. "There won't be any fruits from their love making, it should be okay" But... "There won't be any defects because there will be no offsprings" but.. "It is consensual" You have no idea how many times I had this inner thought battle. Anyway, incest mangas usually are so convincing they make you sympathize with the two involved. Or more! but real life situation like this surely won't get as much sympathy, love and support from people around them. Reality bites.