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

Xiao Yu transmigrated into an interstellar novel and became a mermaid Omega.
It’s just that he was unlucky, traveled to a desolate star that was about to be destroyed, and fell in love with the villain in the book.
what to do? I can get by, but how far can I go?
Ji Canghai was a five-star general admired by thousands of people, and also a notorious star thief. He is an invincible general on the battlefield and a nightmare for the enemy.
No one knew that this cold-blooded and merciless killing machine left the only softness in his heart to his little mermaid.
Due to genetic defects, the mermaid family will gradually become violent and eventually die without the help of mermaid Omega.
The mermaid race, which has not been born for hundreds of years, is miserable. Not to mention the shortened life expectancy, technology, culture, and mineral resources are also greatly restricted.
Xiao Yu, who came across time, became the mermaid’s only salvation by accident, and was also hated by the mermaid’s enemies.
When many forces are vying for him, only Ji Canghai will always stand by his side, never leaving him.
“Others look up to you and worship you because you are strong enough to protect or take their lives.”
“I am the only one in the world who loves you, not only because I yearn for your body.”

Content tags: Qiangqiang Interstellar Wearing Books Shuangwen
Search keywords: Protagonist: Xiao Yu ┃ Supporting role: Ji Canghai ┃ Others:

- Description from novelbuddy

What should you do when the person you like is no longer loyal? Find another one!

This time, in order to avoid trouble, Xiong Ye chose the weakest man in the tribe as his new companion.

In any case, he can afford him!

With his strength, he’ll definitely be able to let his own man eat meat every day instead of grass.

* *

Zhou Ji, the ‘weakest man’ who had just transmigrated over from the apocalypse and likes to indulge in eating ‘grass’: “…”

He’s not the same person anymore! He is clearly capable of killing the entire tribe by himself!

Ukei Kaito fought a desperate struggle in order to fulfill his role as a summoned hero. He defeated the Demon Lord and saved the very world, only to meet an end filled but with betrayal. The companions that he’d trusted throughout his journey betrayed him and killed him by sticking a blade through his chest.