Attack on Titan Creator Apologies for Sex Joke

In the latest issue of Attack on Titan, there is a hidden sex gag. Today, the manga's creator Hajime Isayama apologized on his blog. Apparently, he didn't know about it until after the fact.

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Lord_Sloth1496d ago

I don't know the joke in question. I read the issue but I didn't notice any "off color" jokes. Maybe I just didn't consider all that out of place.