The main character, Leon, was abandoned to the world of demons right after he was born because of his lack of magical power. However, his fate changes completely when the Four Heavenly Kings of the Demon King’s Army picks him up. The Four Heavenly Kings, the strongest and most powerful figures in the world, had trained him personally and took good care of him. As time passed, the boy became a magnificent soldier of the Demon King’s army with the power to “rule” every kind of magic. Leon has been given a new mission to protect Alicia, who will enroll in a magic academy on the island called “Paradise Island.”... more>>

”As one of the members of the Demon King’s army, I will fulfill my duties with honour!”

For the sake of his benefactors, the Four Heavenly Kings, who he holds in high esteem, he tackles the mission head on.

“More importantly, Leon is so cute and I can’t help myself.”

“Wait a minute, girls. Leon is mine. I’m not going to hand him over to you."

Ignoring Leon, the four heavenly kings and the daughter of the Demon King, Alicia, are madly showing their affection for him.

“Let’s go together to the academy, Leon.”

“Absolutely, Your Highness!”

“And let’s do our best, Leon.”

“Certainly, Your Highness!”

“If this mission is a success, let’s get married.”

“Absolute……Wait what? <<less

Although he had a magic aptitude of only 40, which is considered to be a failure as a magician...... more>>

During the granting ceremony, Kaito was granted earth magic, space storage, and teleportation magic. However, he only had a magic aptitude of 40, which is considered to be a failure as a magician.

Those with high magic aptitude need at least 70-80 to use magic that is considered to be average for people with a magic aptitude of 100-120. However, there is nothing you can do if you don't have it.

He devotes himself to the adventurer's profession, using the knowledge of his previous life. <<less

The apprentice dragon hunter stepped into the forest rumored to be inhabited by "evil dragons" for the first time—... more>>

Without hunting any dragons, she had her heart stolen by a dragon instead.

The main principles for survival of a dragon hunter are as follows:

Don’t approach the dragon's lair
Don’t lie to a dragon
Don’t approach a dragon in heat!
Refrain from approaching a dragon in heat!
Under any circumstance, never approach a dragon in heat!

On her first day on the job, she violated all of the above and what awaited her… was the absolute favor of the dragon.

She was well aware that what she was doing was wrong.

But— becoming a dragon’s bonded human suddenly took precedence over being a dragon hunter. <<less

I thought that if I went to another world I could achieve a cheat harem. Although my body has been transformed and I have strong... more>> abilities, I am not invincible and my opponents are legendary and mythical creatures. This is the story of how I may one day become the strongest. <<less

His goal had been to become stronger than everyone else.
It was all he could think about.... more>>

Verdin, the greatest swordsman on the continent, had reigned supreme.
But, one day, he died after a glorious battle with the Calamitous Lord.

"...Huh?"

When he opened his eyes, he found that he had regressed back to when he was a little kid.
He didn't know why, but he now had the chance to become even stronger than he had once been.

Verdin, previously the strongest man on the continent,
begins his journey as a swordsman once more! <<less

At the age of ten, anyone would receive two skills from an entity called God.
A girl who wants to be an adventurer, Reno, was given automatic attack evasion skill, [Dodge] and a skill to be able to put in and out items, [Storage].
Neither skill was suitable for battle, so she was living the gloomy days of being a luggage carrier without being an adventurer.... more>>

However, wheel of fate turned heavily when she joined an Evil Dragon slaying party as a luggage carrier.
Abandoned by the Hero in the deepest part of the dungeon where the dragon is hidden, Reno got the power to fight when she acquired a necklace which the strongest Dragon Slayer, Reina’s spirit sealed in.

This is an epic of a girl who later would be called The Dragon-Killing Hero. <<less

The daughter of a duke, the stuttering Maximilian, married a knight of lowly status at her father’s coercion.... more>>

After their first night, her husband departed for an expedition without another word.

He comes back three years later, this time as a famous knight in the whole continent.

How would Maximilian face him on his return? <<less