Clan Building System: I'm not the Protagonist?! - Chapter 1 - 30th Birthday Celebration.

The ancient empire was on its last legs, the nascent federation echoed with the roar of steam, slumbering gods gradually awoke, and colossal beasts that vanished in the primordial era were slowly emerging.When Laine arrived in another world, a magical profession panel awakened within him as well.Laine believed that if a person's life could keep growing stronger, one day they would certainly be able to control their own destiny and stand shoulder to shoulder with the gods!

Once through the pirates, Lu En became the son of Monkey d Dragon, a grandfather named Monkey d Karp, and an unreliable and neurotic younger brother named Luffy.

Fortunately, the ghost back system is activated!

The completion of the ghost back is 10%, and the training effect is increased by 100 times!

The completion of the ghost back is 20%, and the training effect is increased by 1000 times!

…

One day, Lu En, a ghost-backed master, appeared in front of Luffy who was shouting to go to sea, and made Luffy cry on the spot.

Luffy: “The pirates in the sea are all monsters like my brother? I don’t want to go out to sea!”

Garp: “For a long time, the two boys, Long and Luffy, with small arms and calves, I really doubt that they are not my sons and grandsons. Like Lu En, they are the grandsons of the old man!”

Warring States: “The strongest creature in the sea, land and air is Kaido? No, it’s Lu En!”

- Description from novelbuddy

I was once asked a question.“How far would you go for her?”“How much are you willing to suffer just for her ?”“Would you sacrifice yourself for her?”I answered“I will sacrifice myself, but at the same time I won't ”Why? He asked“It's simple ” I replied“I'm willing to die 9999 times just for her but on the 10 thousands time I won't die I'll live with her and make her happy ”“Why not a billion times”“It's simple it's because I love her and she loves me, I will live with her after 9999 deaths she needs me and I need her that's how much I love her”“Then die, die 9999 times just for her and save her from this world”“I intend to ”

Leon transmigrated and became a lab rat for Hydra. But he ended up awakening the sign-in system.[Ding, sign-in reward: Glint-Glint Fruit(Pika Pika no Mi).]He starts by destroying the Hydra Base.He accumulated some time and got himself another reward![Ding! Get the sign-in reward: Sun Breathing Technique.]