He's Obviously a Demon King but He's Too Useless

You are the summoned Demon King, and your goal is to confront and win against the once-in-a-millennium hero. And your attribute is the N card of N cards among all the demon kings that can be summoned. Please start your show! -Instructions for reading the article- 1. First person multiple keystrokes 2. Write something silly, maybe not so silly, I'm really trying to be funny. 3. Brave × Demon King classic combination 4. Suddenly I realized that it was almost Chinese Valentine's Day, so I wanted to write something. 5. I am a fan of Western fantasy, and I don't have much research evidence. I just write whatever comes to mind. 6. Maybe there will be a companion piece "Obviously a waste but too devilish" (just a joke) 7. The heroine is very naive, and so am I. 8. Basically don't read the comment section, and there should be no one commenting. Motto: You don't have to be a rose