Khế Ước Với Thiên Thần Tám Cánh

Rio Frias transmigrates into a Beast Taming world and summons a top-tier Succubus, only for her to abandon him and choose to follow a wealthy man. Little does she know that Rio possesses a special system. Later on, he makes a pact with a broken-winged angel. Everyone mocks him for being desperate, unaware that he can evolve spirit beasts. When the eight-winged seraph descends, the entire world is shaken to its core!