Super Zoo - Chapter 17 - I will be very gentle

Tian Long, an orphan without much of a life in both his thirty year long life and lifespan!
To him, a single opportunity was displayed to transmigrate into another world with his Death Book!
"What's this? Is this the body of a three year old? Davis? Is this my name from now on?"
Finding himself possessing a small child, he becomes inwardly conflicted before he faces the truth and his reality!
Young Davis finds himself as the legal heir, the Crown Prince of the Loret Empire in the Grand Sea Continent, becoming a powerful cultivator in a short time...
However, is that all?
Follow his journey as Young Davis becomes a full fledged death's advocate while embodying into the Divine Emperor of Death in the world of cultivation!
"Mn? The route to become the Emperor is a given? Nah, I still don't want it..."
"Oh? I'm courting death you say? Unfortunately for you, death is already my woman..."

“Destiny is a matter of Choice not Chance,

It is not a thing to be waited for but a thing to be Achieved”

.....................

The story sets in a mana blessed world, Planet Vermillion, where every being possesses a System.

At the edge of his life, Zero, a man without a System, finally loses everything and embraces his death with a tired yet relieved expression.

As if by fate, the owner of the system approaches Zero through a screen and gives him a chance to connect with the System, however Zero denies it in exchange for a chance to change or undo all the mistakes he has done in his life.

The owner of the System accepts Zero’s wishes but at a certain price and sends Zero back into the past.

Still without a System, but with the knowledge of the future and various skills honed over the years, Zero begins his new journey to change everything he could.

Save everyone who needs to be saved and kill everyone who needs to be killed.

However, the more he moves forward, the more he realises that the ‘truths’ which he had known in his previous life are much more complicated than what they seem.

Balancing his previous beliefs and the new found mysteries that could shatter his perspective, he still keeps moving forward despite things getting more chaotic with every step.

As if fate itself wanted him to fall, an unknown disaster approaches him from behind and a familiar screen comes in front of him

[Ummm… Zero. It might be a bit late but… Looks like I have messed up big time]

This novel is also known as The Demons Beside Me

Chen Zhao can summon demons and see Death.

“Beelzebub, use your Gluttony ability to treat this patient’s anorexia.”

“Raymond, this old man wants to regain his manly function. You know what I mean.”

- Description from Novelupdates

(following the boat) When a person who can get random superpowers every day enters the world of pirates and joins the protagonist group, what will happen as a result?

Luffy: “Si Guoyi! Lin Bei, let’s jump from the sky again!” Kebi: “Please don’t!” Sauron: “Be sure to leave Lin Bei’s room at twelve o’clock every day!”

Nami: “This bastard, just let me…” Akainu Sakasaki: “Bastard Lin Bei, turn me back into a man!

The old lady used her ability to come to her aunt once! “Big” boys, come and meet your father! “Lin Bei:!!! This really doesn’t exist!!!

- Description from novelbuddy