Toaru Majutsu no Index: New Testament - Volume 1, Chapter 3: A Slight Margin and an Omen That Connects to the Next. Girl.

“Boss. Aren’t you too greedy? You are selling this husky mutt for 500,000?”

A cute girl in a ponytail held a husky puppy, whose eyes looked exceptionally wise, in her arms as she glared at Lin Ye. Her gaze was accusing him of being a dishonest trader.

Lin Ye explained, “Miss, I have to formally inform you: this is not a husky mutt.”

The girl retorted, “Don’t you dare trick me.”

“I’m serious. It has the bloodline of Cerberus. Its potential is limitless.”

The girl was stunned by Lin Ye’s words.

After pondering for a moment, she realized that what he said was absurd. Agitated, she yelled, “Are you sure? I don’t believe it!”

Lin Ye gestured at the husky in her arms as he said, “Little fella, get down and show your future owner what you can do. Go!”

“Woof!”

The girl shrieked in horror as she witnessed the little husky spit out a fireball the size of a fist.

……

Many years later, Lin Ye has crowned the Father of Beast-taming of the Blue Planet. When he was interviewed, he said forlornly, “It all started with a husky mutt.”

At the same time, in a mansion, a gigantic red dog with three heads sneezed. Then, it barked at the television before it.

“Woof!”

Before Li Daniu had time to be excited about being a prince who was about to ascend the throne, he learned that his country was about to be submerged by sea water.

“Can I wear it back?”

- Description from novelbuddy

Mochizuki Touya, a 15-year-old boy, who got zapped by a flash of lightning due to a freak accident caused by God, wakes up and finds himself face-to-face with God.

The Immortal Path led to Longevity and Sovereign was heading in ease. When the Longevity was no longer in ease, all living beings were just prisoners. Conspiracy, internal strife, and the invasion of the others, all of it emerged together.

In such a world, there was such a young man. He made his way upstream, stepping on blood, defying the emperor, destroying the various kings, and slaughtering his way through the hundred clans to form an Immortal Path towards the throne of Sovereign! The Immortal Path was endless, while the Sovereign was limited. He used his blood to forge his immortal legend.