A brief description of the “I Am Behemoth Of The S Rank Monster But I Am Mistaken As A Cat And I Live As A Pet Of Elf Girl” manga:
Young elf Aria is an adventurer. She has a cute face that attracts almost everyone’s attention. Her breasts are ripe enough to seem ready to explode any minute. And in the embrace of that breast was a little animal… His name was Tama. At first glance, he looked like a cat, but Aria and her entourage couldn’t see the truth. Tama was a reincarnated man and his real form wasn’t just a regular cat. On the contrary, he’s a S-class monster, a young hippo.