What kind of demon king? Please call me the upgrade package of the goddess.

I would like to ask, in this dangerous world full of beautiful girls, how can a demon king survive well?
A certain male succubus replied: First, you need to train a group of monster girls with super abilities.
For example, slime loli, tsundere fox-eared girl, cold wolf lady, naughty little rabbit, etc.
Then, you need to learn to communicate with people in a friendly way, such as:
Capture a teammate of the Brave Girl, and then tell her kindly: "Miss Brave, you don't want your teammates to get hurt, right?"
Then, he gently asked the mother of the brave girl, "You don't want your brave daughter to be damaged by me, do you?"
You can also worry about the safety of certain countries: "King, if you don't want to lose your country, please let the queen come and talk to me."
If you are lucky enough to meet a lovely saint, you should also smile and express your kindness to her: "Miss Saint, if you don't want to be bullied by me in front of the goddess's statue, you know what to do, right?"
If you learn these, you can live well in another world~