I, the All-Powerful Mage, Was Contracted to Become a Summoned Beast?

[Another world + Western fantasy + pretending to be a pig and eating a tiger + development + single female protagonist + plot direction] Warm quietly and slowly, don't enter if you don't mind. Chen Mu, the most powerful mage in history, responded to the call of another world due to a thought. However, what awaits him is that 99% of his power is sealed, his body is reduced to a weakling, and he even becomes the contracted summoned beast of a blond girl whose life experience is a mystery! What's even more fatal is that he discovers that he only has seven days left to live! ... Many years later, when everyone in the world surrendered to the supreme "Queen of Summoning", Only she knew that the figure behind the throne was the one in charge of everything - the uncrowned king.