Kuoh's hero of time (high school dxd harem x OP male Link oc x LOZ harem)

Rias was taking a walk by herself one night and she came across a cave shrine. it was unusual for her since usually places like shrines gives devils excruciating pain but not this shrine apparently. When Rias walked inside the shrine, she saw a blonde haired boy sleeping in some kind of water. The boy woke up and saw Rias but was curious about her. Rias couldn't believe how handsome he is but decided not to add him to her peerage, even though she wants to. Rias could tell how kind he is and asked him for his help. He agreed to and he became allies with the devils. After he saved Rias from a forced engagement, she fell in love with him along with every other girl.