Game of Thrones: Oath of Iron and Fire - Chapter 56: Meets Highgarden’s Envoys

Imperial soldier Suldak Helansa joined the infantry regiment of the Grand Duke Newman in Bena province, participated in the Warsaw plane war, and rescued a young man in the forest battle. This qualified young man suffered some injuries. Injured, still a mute, Suldak brought him into the barracks, and what we are telling is the story of this young man of unknown origin…

- Description from novelbuddy

Jianghu was in turmoil, an era of great strife. The leader of Great Qin wielded the Mo Blade, leaving the world battered and bruised. The ageless figures of Jianghu crouched upon the mountains, and with a single turn, they cast the entire world below them. Strong men measured the earth with their feet, and heroes of Jianghu could cleave the heavens with one sword, yet in the blink of an eye, they were drunk in the embrace of beauties. The Taoist carried his sword, the Scholar drunk on wine. Wearing tattered clothes, a beggar grasped a rotten branch and dared to storm the ancestral hall of the Taoist Sect. On the willow-lined causeway, in the long pavilion, a man who had sat withered for thirty years turned and stepped out, holding a peach blossom, with a flick of his wrist, he shattered ten miles of red candles. The era of Great Qin was renamed the Great Yuan Era. The youth with the Wooden Sword left his mountain village behind.

In 2036, humankind steps foot on Mars for the first time.

Failing in his job hunting, Sanada Kyouichirou was hopeless in this society. When kyouichirou had thrown himself towards the bottom of a cliff. When he woke up his body had returned towards when he was in fifth grade of elementary school. He did not want to have any regrets in this life so he had decided on building up an harem in this second life.

The elder sister that he admired, a senior and president of the student council at a school for rich young girls, a strong minded upper classman at school. The poison fang of Kyouichirou who had pretended to be a innocent child attacks those girls.