MTL - Dawn of the Grey Tower - Chapter 73 Mountain top

However, he did not know that he was not raising just a harmless pet, but a biological weapon secretly made by the government… a real monster.

As a former librarian, Rand felt that he had been living an ordinary life, the one that he had reclaimed unconsciously every single day.

Recently, he has been a little upset because the pet fish he accidently brought home to raised seems to have undergo some strange changes

Well, it turned into a merman.

- Description from Novelupdates

Procedural Memory: a type of implicit memory (unconscious, long-term memory) which aids the performance of particular types of tasks without conscious awareness of these previous experiences.

“No matter how much I search on the Internet, there is nothing that that even remotely mentions the phenomenon I am currently experiencing.”

“The ability to use someone else’s Procedural Memory at will, what do you even call that phenomenon?”

Park Dowook, a doctor who is able to use the Procedural Memory of others as if it was his own. His special one-of-a-kind treatment begins now!

~ Erothyria is a world where depravity and fantasy collides ~ And this world is where Dagwood Ackley was thrust into! After picking up the rejected video game called ‘The Daughters of Eros,’ Dagwood is reincarnated into the game and is reborn as a son of Eros! But...it is impossible! No Mother is allowed to begat a son! He takes the identity; Aeric of Starlight, and gains extreme beauty and charm as the first and only ever son of the God Eros. But what is his task? Ding! [Claim all the wives and daughters of Eros] Ding! [Defeat the Goddess of Lust and Claim her!] Ding! [Build a harem of Queen Mothers and daughters and take over the Throne of Eros!] With the Celestial Depravity System, Aeric becomes the most sought after male in all of Erothyria, but he must defend this land from the evil dragons and titans, and in the end, [Claim] it all for himself!

He said coolly: “One million a month, stay with me!” She raised her eyebrows and smiled: “Pay a 30% deposit first, no credit!” Show no mercy. When the contract expired, she turned around gracefully, and when he chased after her, she found that there was already a kid the size of a kid beside her…

- Description from novelbuddy