Shock System: Marry The Female Lord

After Ye Yun transmigrated, he was surprised to find himself bound to a bed in a woman’s room. The memories he got told him that this place was an ancient martial cultivation world where demons and devils roamed freely, and he was the trash-level outer sect disciple on the Heaven Smiting Sect. 
The reason he was bound to a bed was that the beautiful sect master wanted to use him as a fake husband, so she can repel some troublesome people. She wanted to seal Ye Yun’s profound qi first, but while doing so, she discovered that Ye Yun had the strongest inborn Devil Body. This Devil Body will help her cultivation realm to reach new heights. The only problem was... She had to have intercourse with him.