2.687 out of 5 from 33 votes
One day Ralph, the king of lizards and a proud Tyranosaurus, was hunting for his next meal when a large comet struck Earth. With no idea what had happened Ralph wakes up to discover that he's trapped in the body of a high school girl named Kana in modern day Japan! Outraged at this turn of events, the grumpy T-Rex has no intention of adapting to his new circumstances. However, with Ralph causing mayhem everywhere he goes there are bound to be consequences, especially when one of his old acquaintances is intent on settling a sixty million year old grudge...
Both of these manga are eichii with gender-bender themes. Trans Venus goes all out with the gender-bender, while Boukun Tyrano-san takes a more unusual approach (with the main character being a male T-rex who is stuck in the body of a female human). Both manga have crazy, over-the-top plots. It should be noted that Trans Venus is alot more explict than Boukun Tyrano-san. That said, I have a feeling that if you like one you will probably like the other.