Gitei Shikomi no H na Karada Koe ga Morechau

Ayane is a career-oriented woman, but her true goal is to marry a rich man. She has a perfect boyfriend, but he won't do more than kiss her. That makes Ayane depressed because she thinks she's not attractive as a woman. One day, a handsome boy named Otoya moves into her house saying, "I'm your brother from now on!" Otoya turns out to be the son of the president of the popular fashion brand! Ayane and Otoya's life together now begins...

from Renta!
Official Chinese Translation
Official Korean Translation