Ame no Hi no Iris - Chapter 4 - Letters Part 1

[Dragon Family, prequel to Game of Thrones]

Becoming the one-day crown prince who should have died young, Rhaegar survived tenaciously.

Being sick and weak cannot defeat him, and losing his qualifications as heir cannot make him give up on himself.

Start the explorer mission, search for the lost treasure, and embark on the legendary road of conquering the seven kingdoms.

Explore the Black Death’s Skull: Obtain the dragon’s legacy, fire resistance +50%.

Explore the auspicious white deer: get the blessing of the auspicious beast and make a wish for a long life.

Explore Blackfire and the Dark Sisters: Obtain the King’s Gaze and the Knight’s Oath.

Rhaegar rode the dragon, sat on the Iron Throne, and despised the machinations of all careerists.

Winter is coming, I will ride on the dragon.

- Description from novelbuddy

I had transmigrated into my favorite game, as an extra who died before the story even began.In a world where Sigils dictate power, I found myself in the body of a boy who had already died on the battlefield.Yet, as I drew breath in his place, his Sigil changed. A power never meant for him, never meant for me.Kidnapped by a shadow organization that didn't exist in the game, I spent three years in the dark, forced to learn under a so-called teacher.I move forward, not as the extra I was meant to be, but as one who chooses their own path. A path to supremacy.Yet the deeper I walk, the more I realize… this world holds secrets that game had never shown.-----------------Additional tags:[Sword Companion], [Hidden Identity], [Artifact Power], [Slow Reveal], [Secret Society], [Survival]

The 7-year-old little crybaby met 11-year-old big brother who ran away from home.
[This man became the protector of redemption in his life]

The 16-year-old little dragon fell in love with a 20-year-old big brother.
[It’s a pity that the big brother didn’t recognize him as the little crybaby]

The 23-year-old single father and 27-year-old chief executive meets again.
[This time the little crybaby and his big brother are finally together]

Fortunately we met through hundreds of millions of people, Thank God, for letting us break through many obstacles and get back together again, falling in love with you and being with you again is the greatest fortune in my life.

- Description from Novelupdates

The world was once at war with 10 alternate worlds. This was known as the Concept War and our world won 60 years ago. All of this was concealed so no normal people are aware of this fact in the current time.

After the death of his grandfather, the high-school student Sayama Mikoto is suddenly summoned by the giant corporation IAI. He learns this world is headed for destruction due to the acceleration of the Minus Concepts. To prevent this, negotiations must be undertaken with the survivors of the other parallel worlds so their 10 concepts can be released.

And so Sayama is caught up in the final battle to clean up after the Concept War which left behind so much enmity.