Just became an evil god and was summoned by the saint

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"You know, the whole world is actually a game. I am the strongest evil god in this game. I can easily defeat the twelve main gods alone."
"That's amazing, then why is it sealed?"
"Because I traveled through time when the fight started! I don't have a keyboard in my hand! But it doesn't matter, help me break the seal, and you will be the Lord God."
"Mmm Good."
The Saint Lady responded while writing in her diary:
[As long as you don't unlock it... Mr. Evil God will always belong to me (crossed out)]
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This book is also known as "I Traveled Through Time and Became an Evil God and Was Sealed by the Gods, But the One Who Summoned Me Was the Saint of the Gods' Court?"