Video Game Tycoon in Tokyo - Chapter 37: Free promotion?

Earth Immortals are cultivated from a blessed land.

Heaven Immortals move to and from the divine mountains.

I have a stalk of plum blossom, and I shall plunder the Will of the Heavens with it!

- Description from Novelupdates

Two years ago, the mere fifteen-year-old scion of the Lin family, in front of the colossal behemoth that is the Murong clan, made a vow!Two years later, no one knows what he has gone through, but from the moment of his return, he radiates a brilliance that seems to compete with heaven and earth!(Note: The protagonist of this book is very aloof, cold, and passionate. Those who like to read about a military king's ambiguous romances and flirts, please bypass this one.)

Volume 1 (Set between volumes 13 and 14)

A series of short stories set before the events of volume fourteen including how Team GROUP was formed.

Volume 2 (Set between volumes 16 and 17)

A series of short stories including two separate meetings between Touma’s and Mikoto’s parents, two tales involving two of the Level 5s of Academy City, and other funny stories involving some of the characters.

As a reward for preventing the assassination of the current king, Rou Coral is rewarded with becoming and escort of the Royal Princess Reaina who the boy adores so much. Thus begins his new life of servitude under his beloved high-headed Princess full of happenings and happy little accidents. Surrounded with Busty Head Maid, young Loli Princess and a Childhood Friend Maid, for the boy knight today is yet another day of struggle in this womanly paradise!!