Leona vs Keima

The Leona Games were a series of athletic sports race. It actually happened in a dungeon and Rokuko could see the Dungeon's Floors as if it was a Dungeon Battle.

Beforehand
Leona appeared in Goren and infiltrated into the Beddhist Church as a nun.

After Keima was "charmed" by Michiru, Suilla and the other Succubi led Keima to Leona, where they exchanged words about both of them being Dungeon Masters and Soldier of Gods. She couldn't convince Keima to join her, she abducted Niku as she was created by her from her daughter's uterus.

Later on, she challenged Keima to a series of sports games as both of them came from Japan where this kind of entertainment is really successful.

During the Dungeon Battle
After Keima, Rei and Ichika stepped into the Dungeon: Keima was unsure that she would hold onto her promise so she effortlessly made a {Trinity Scroll} from a stone she found than made Keima learn it.
 * The goal is to save the captured princess. Earn 99 points.

Leona's Rules:

 * 1) Points are earned for each room of the dungeon conquered
 * 2) Upon earning enough points, Toi (Niku Kuroinu) will be returned
 * 3) The participants are Keima, Ichika, and Rei
 * 4) As long as the rules of each room are obeyed, the participants will not be harmed

Keima's:
After some "games" Rokuko said this dungeon has only 4 rooms and they are circling inside. Keima decides to use this in his strategy:
 * 1) No games can be impossible to beat.
 * 2) As long as the participants do not give up in the process of clearing rooms, it must not be impossible to save Niku Kuroinu.
 * 3) Do not hide any rules.
 * 4) The Game Master’s team cannot interfere with the participants beyond explaining the rules.
 * 5) If the Game Master breaks the rules, Niku Kuroinu must be returned safely.

First, he used his {Summon Gargoyle} magic until he spawned the whole room full with Gargoyles.

Then they rushed through the rest of the rooms leaving 1 member behind.

That meant there was an empty room without game leading to Leona's impossible game. She had countermeasures for this like ''"This room’s challenge is playing rock paper scissors with me. But it has an extra rule that three challengers must be present". Keima's answer was simple: "I quit."''

After Leona realized Keima was right, he suggested a new game. Pop the balloon that floats above Leona while fighting.

While they were fighting Rei accidentally was killed by Leona, making her broke one of her promises. So Keima's team won. Later it was revealed that Named Dungeon Monsters can be revived for their worth time 10 Dungeon Point. Her revive was 800.000DP, the amount was paid by Leona of course.

Aftermath
Leona disappeared leaving the Succubi and the dungeon behind

Keima made a {Trinity} pact with the succubi and making them work at the Church