I Was Possessed By An Unknown Manga - Chapter 121: Sea ​​House

In the 900th millennium of humanity's journey towards the Star Sea, the unstoppable Expeditionary Army dominates the universe, and the fiery Age of Great Expansion nears its conclusion.Ancient cultivators seize mythology in pursuit of becoming sacred Buddhas; the new generation of prodigies shatter shackles, yearning to surpass limits!Yet, in a secluded corner of the vast cosmos, Qin Shi chooses to grind through countless achievements, unlocking one monument after another.Until reaching the pinnacle of evolution, the ultimate summit!

Emily Molson, PA to Derek Haven, CEO of Haven Group has nightmares every night, that prevent her from getting a good night's rest.Derek Haven, on the other hand is lucky to get any sleep at all. The two of them work close together but have no idea that they have the same problem.Then one night they end up in bed together and a miracle happens.

In a world where human and monsters relied on mystical fruits and their inner power to fight for dominance, a lost soul was thrown, given the powers from all the other worlds he’s known. But there was a catch; he had no control over what power he would get! With knowledge beyond that of most, he sails his path to the top of the one piece world!

- Description from Novelupdates

I got transmigrated into a game I’ve never seen before.

I thought it was a top-notch RPG and spent 30 years on it.

I retired as a war hero and planned to spend my remaining time leisurely.

But it turns out, it was an academy story?