Strongest Survival by Otome Game’s Heroine (LN) - Vol 5 Chapter 3: Royal Sorcery Academy

The Third World War has been ended by the efforts of Kamijou Touma. With that, he vanished. With the Magic Side regrouping, the Sabbath for their followers has arrived.

In the headquarters of the Science Side, Academy City’s strongest Level 5 Esper Accelerator has washed his hands off the “Darkness.” Along with Last Order and Misaka Worst, his days pass by peacefully with no sign of GROUP.

Hamazura Shiage has formed a new ITEM with Kinuhata, Takitsubo and Mugino. Peace has come to the hands of the alumni who have “graduated” from Academy’s Dark Side at last… at least until a new evil “first year student” appears before them.

— This is a follow up to the popular Toaru Majutsu no Index light novel series, where Kamachi-Sensei has promised to deliver new premises and give a totally new flavor to the fights and plot developments

“Chief, it’s bad; our people are injured! Hurry, take them to the Divine Tree!”“Chief, it’s bad; our people are on the brink of death, about to perish! Quick, to the Divine Tree!”“Chief, it’s bad; our people have just passed away! Quickly, to the Divine Tree, and do not let the body grow cold on the way!”Reincarnated as a frail locust tree, Ji Yang merely wished to bask in the sun each day, gaze upon the moon, and live a leisurely life.Yet, years later, as Ji Yang looked down upon all beings, he suddenly realized that this world lay upon his roots and within his shade.And that initial small clan, unbeknownst to him, had its name resound through the heavens!

At the beginning of the universe, there was only chaos. Chaos gave birth to a world, accumulating into Black and White and the five elements (also known as the Origin Elements), creating the world's laws and the order of heaven and earth.

This world was called the Origin world, where the Original beings born out of chaos reigned. They created orders, creatures, and numerous worlds where they reigned as Supreme beings until a calamity befell them and destroyed the Original world alongside numerous worlds.

Two billion years have passed since then. In a small world somewhere, a baby was born carrying an unusual past.

As the second daughter of Ningyuan Army General, Qin Wanru, who had been set up by her so-called mother and elder sister, lost her reputation and suffered a lot on her wedding in her previous life.

Now she was reborn and returned to the time before she married to Qi Tianyu, the first son of the magistrate of Jiangzhou.

The rebirth gave her a chance to revenge on her own wedding and uncover the plot of her mother and elder sister. Would she be able to change her fate?

- Description from Novelupdates