Toaru Majutsu no Index: Genesis Testament - Volume 4, Chapter 3: The Counterattack Begins – Boy_not_“Dark”.

Ayaan is a young resident aspiring to be a surgeon, the final stage of a full on graduated plague doctor. However, in her attempt to redeem herself after a sudden discontinuation, she finds herself unravelling mysteries about her institution that are rather gut wrenching. Stick around and watch her persevere in a world full of monsters; creatures and humans alike.

Su Wan is a Realm Destroyer. She shuttles to different time-spaces using the identity of the “Cannon Fodder Ex-Girlfriend”, dedicated to plotting how to happily tear apart the male protagonist and the female protagonist. –There’s no such thing as protagonists who can’t be torn apart, only Ex-Girlfriends who don’t work hard enough~

Before going to college, an ordinary high school student went to celebrate and got drunk. When he woke up, he found himself in a completely different world. There was a big sect, the approaching sect entrance examination, a slum where his body’s previous owner lived, and a shared memory about a missing young girl.

When he got tangled in a fight with a few punks in this different world, he fell off a cliff and miraculously found himself still alive, with two more voices ringing inside his head. They were Sword Master and Saber Master. In the company of them, he continued to find out more about this whole new world. He took the sect entrance examination, entered the sect, met a strange man in black, and even participated in a major competition of the sect to have a chance to win over his peers!
In this whole new world, he was born again and got to explore the fantastic martial world!

- Description from Novelupdates

«Darkness cannot drive out darkness, only Light can do that» the Goddess Amaltheia said as she held William in her loving embrace.

«Hate cannot drive out hate, only Love can do that.»

In order to help his little brothers and sisters at the orphanage, and save the person he loves, William decided to make the ultimate sacrifice.

This selfless act caught the eyes of the Gods which allowed William to have an opportunity to enter the Cycle of Reincarnation with their blessings. Together with his Mama Ella, and a herd of goats, William embarks on a new journey to find the meaning of happiness in his new life.

In a world of Swords and Magic, where adventures roam wild and free, a new legend is about to begin!

[Disclaimer: You might get addicted reading this story.]