Road to become a King

On the way back, you asked Rias: "What happened just now?"

"Succubus has one weakness: if they got pregnant, their power would disappear until the child was born. However, they absorb energy from semen. That process kills all sperms, effective than any contraceptive method. I'm impressed that you still manage to impregnate her."

You fell silent for a short time, then asked: "Can we release her?"

"You're concerned about the child she's carrying, right? Don't worry, while she was sealing, the fetus won't develop. After she finishes her sentence, she'll be released."

"Is there any other way?"

"Well, then you have to become a King. After that, you can let her become a member of your peerage. But the Evil Pieces set only be granted to a High-Class Devil.

There are three different ways to raise the ranking:

1. Contracting: Doing Devil jobs by granting the client's wish. This includes having a high number of contracts completed with high-quality rewards. A Devil's contracts will garner points over time, but it is a gradual process unless the customer is someone with great power and influence. This is considered to be the slowest method. A promotion through contracts is seen as more of a tradition.
2. Military Accomplishments: Obtaining great achievement in the times of crisis or situations. This includes showing exceptional ability or skill in combat. By defeating high-ranked enemies of the Devils, such as leaders of the Angels or Fallen Angels, a Devil can be rewarded. This is the fastest method, However, this route is unlikely in the current stalemate without a full-scale war.
3. Rating Game: The last method is by doing well in Rating Games. This includes earning high points, public esteem, and opinion in official Rating Games. This is the modern path of ascent in Devil society, as it was designed to promote and train new powerful Devils. The Rating Game allows reborn Devils to hone and show off their skill and abilities against others in a controlled non-lethal environment. Performing well in the Rating Game raises reputation and leads to promotion. Some of the Top Rankers in the Rating Games have all reached Ultimate-Class, With the 7th ranker being the highest-ranked reborn Devil. This is by far the best method to raise one's own ranking.

Currently, you can only choose the first method. The mission we just execute belongs to this method too, but since it's a hard mission and all our club did it, you gain only 10 points."

She pointed to a door on the left of club room: "You can go to the summoning room to check. If there is any mission for you, the summoning circle will glow. Step into it and you'll be teleported to the client's location. But I recommend you to return home to rest since you did a hard work today."