MTL - Invincible Level Up - v9 Chapter 677 Is it him?

A surgeon accidentally got the blessings of a system, shocked the medical industry, and rejuvenated countless people.

- Description from Novelupdates

What would you do if one day you were suddenly told that the gods weren’t just beings from Myth and Legend but an undeniable truth? Would you laugh? Scoff? Or maybe even ignore it altogether. For a young man called Aiden, his choice was simply a mixture of all 3. but when confronted with Divine soldiers that could call forth terrifying flames at just thought, there was no room left for denial. These Divine Soldiers not only informed Aiden of his divine heritage but also invited him to join Olympus Academy, a place known as the training ground of the gods. For most people, such a revelation could leave them questioning reality for several weeks, but for someone bogged down with life like Aiden, it wasn’t a crisis but a once in a lifetime opportunity! As Aiden arrived at the academy he discovered not only was h e talented but hsi genius was so monstrous it made even the gods start paying attention. from then on Aiden didn’t hold back he blazed forward fearlessly, smashing giants, crushing tians and even duelling against the gods. Follow Aiden as he traverses across mystical realms, fights against monsters and creatures of legend and does something unseen since ancient times, to reach for the domain of the gods and surpass it!

The strongest Demon Lord dies, and reincarnates as a human. Not only that, he because of various incidents turns into the hero’s best friend.

Follow his journey as he tries to help the hero escape his fate, and on the sideline to conquer the continent while he’s at it.

The daughter of a duke, the stuttering Maximilian, married a knight of lowly status at her father’s coercion.

After their first night, her husband departed for an expedition without another word.

He comes back three years later, this time as a famous knight in the whole continent.

How would Maximilian face him on his return?