One Piece: Dream of Immortality - Chapter 521: Tears and Tanks

The 7-year-old little crybaby met 11-year-old big brother who ran away from home.
[This man became the protector of redemption in his life]

The 16-year-old little dragon fell in love with a 20-year-old big brother.
[It’s a pity that the big brother didn’t recognize him as the little crybaby]

The 23-year-old single father and 27-year-old chief executive meets again.
[This time the little crybaby and his big brother are finally together]

Fortunately we met through hundreds of millions of people, Thank God, for letting us break through many obstacles and get back together again, falling in love with you and being with you again is the greatest fortune in my life.

- Description from Novelupdates

As the number one pill alchemist of the immortal world, Mu Chen had always believed that it was because he had single-mindedly focused on concocting pills that led to him to neglect disciplining his disciple. Which in turn, caused his disciple to be led astray by the seduction of devil cultivation, leading to the three realms to fall to disaster. After his rebirth, Mu Chen resolved to properly teach his disciple, give him the very best resources, earnestly love him, carry him close to his heart, teach him by way of example, and didn’t let him grow corrupt.

I thought I had been abandoned,But I was actually the child that the Namgoong family had been searching for.It wasn’t until I was killed by the Blood Demon, whom I had called “teacher,” that I learned the truth. When I awoke again as a thirteen-year-old child, I decided to return to the Namgoong family.I didn’t seek to be recognized as family.I only wanted to prevent the Namgoong family from falling apart as it had before.“This is the jewelry, silk, gold bars, and elixirs that the family head has gifted to you.”“Here, little one. This is a congratulatory gift for your return.”As soon as I was recognized as the lost granddaughter of the Namgoong family,I gained delicious food, fine clothes, gold and silver treasures, and a high-quality sword!I also gained a grandfather and a father who cried and laughed for me.But what was that strange, tingling feeling in my chest every time that happened?In order to protect the smiles of those I had once killed,and to preserve this warm and ticklish sensation for as long as I could,I was determined to change the bloody future that awaited me, unlike my previous life…**Namgoong Mucheon’s face darkened.‘Is this child truly raised to be an assassin?’The sharp killing intent and the sword techniques essential for an assassin were reflected in her life, as if they were embedded in her very being.‘Damn brat.’Anger surged within Namgoong Mucheon.He restrained himself from cursing aloud in front of his granddaughter, muttering in his mind instead.‘How dare they raise my granddaughter as an assassin?’The blue energy surrounding Namgoong Mucheon grew even stronger.

Three years ago, the animals and plants on Earth underwent crazy and unexplainable changes that included transformations, reversions, and the addition of otherworldly species. And it was the start of a brand-new type of profession in the new generation of humanity – Monster Trainers, people who specialized in taming monsters.