MTL - I, The Grandson of Garp, Scared Luffy Into Tears - Chapter 737

MC (female protagonist) dies in a plane crash and wakes up in the body of a beautiful but corrupt and lascivious prime minister in ancient times, Zhang Qinglian. As circumstances decree, he (she) cannot reveal that the original owner’s soul is gone else calamity might occur. So he (she) decides to walk a righteous path, determined to help the lovely but simple little emperor rule the country. Not backing down after facing torture, not losing courage, destroying rebellions and facing off with scheming princes.

- Description from Novelupdates

When the last alien on the world was bound to a stupid but cute world-saving system thinking he was a human:

A resource depleted world:

Alien: “I can help them deplete 5% of the world’s population in the short term, this way, this planet can continue to survive.

System 2d14 was frightened to tears: “No, don’t! Lord host!”

One day:

System 099 was shocked: [Lord host, the record you set for completing one’s first world has been br-broken by a rookie!]

Big boss Huo Li raised an eyebrow in intrigue: [Oh? Who was it?]

A certain alien happily thought that he was invincible among all carbon based life-forms! Until…… he met a powerful psychic ability user!

A horrified alien: “Hey! Why can’t I control myself?”

Powerful psychic controller gong x ultimate evolution of carbon-based organisms shou

Loyal dog with a strong sense of responsibility gong x always pretending to be human black belly shou

In the beginning there is a love-hate relationship and mutual dissing, later there is a pair of husbands cooperating to fight monsters~

- Description from Novelupdates

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.

Until he became the lowest-ranked master, his lonely and luckless life never changed.

Suddenly one day, a descendant injected him with a nanomachine, and the machine started ‘speaking’ to him.

“What? What are you talking about?”

This was beyond the boy’s knowledge, he turned pale.

The Nanomachine linked to his cerebrum realized the User was not understanding a single word it said.

“Who are you, and why are you doing this to me?”

“Nano Mashin?”

The boy’s face hardened.

Mashin was the deity the Mashin Religion worshipped, along with the Sacred Fire.

The religions’ Master communicated with Mashin.

“Um, are you really Mashin?”

The boy knelt down and asked with a trembling voice. At this, the Nanomachine attached to his cerebrum realized it had been misunderstood.