DxD: Building A Demon Clan From Scratch. - Chapter 12: Supernatural Investigation Club

He is an undead who is devoid of all humanity, he is the one and only supreme overlord, he is a man who has severe mysophobia.

There are many people who try to act cool in front of him, whatever soldier king, assassin, system user, transmigrator, reincarnator, the strong returning, the strong coming down from the mountain, person coming back from the immortal world, reincarnation of the devil king, immortal emperor possessing someone’s body, and so on, all of them do not know what will happen next

- Description from Novelupdates

This legend tells the tale of the protagonist, Kuroki summoned to protect the demon king from the hero.

Kuroki, unbeknownst to him, suddenly came to another world. He was summoned by the demon king, Modes. The territory which the demon king overrules was in the midst of being destroyed because of the hero. He had no choice but to bow before Kuroki.

“Please save us, Savior Dono!”

Kuroki nodded, deciding to save the demon king due to an unexpected turn of event.

Qi Ming woke up to find that he had transmigrated. He had become a disciple of the Green Cloud Peak, one of the twelve peaks of the Heaven Enlightenment Sect. Fortunately, the “AFK Farming Software” was activated and changed his life.

“Ding!”

“You had been AFK Farming for seven days in the game dungeon ‘Shu Mountain Ancient Path’. You have cleared the game dungeon seven times. You have obtained: 1 Seven Star Sword, 1 Sword Kinesis Technique, 1 Top-Grade Foundation Establishment Pill, and 630 Low-Grade Spirit Stones.

“Ding!”

“The Green Cloud Qi Refinement Art has been cultivated for a day. Your cultivation progress has increased. You will break through to the next level after 10 days of AFK Farming.

Qi Ming was tired of cultivating. It was too dangerous out there, so he could only cultivate through the AFK Farming Software every day in the sect.

Eventually, Qi Ming reached Foundation Establishment, followed by Golden Core, and subsequently Nascent Soul. He... became invincible?

Previously, Jian Yiling was the supporting character who was destined to be cannon fodder. However now, with the memories of future events, Jian Yiling who had crossed into the novel transformed into a hidden big shot. Not only is Jian Yiling not interested in the male protagonist, but she also leaves the people around her in astonishment and bewilderment.