Bad_gee

The ultimate power called Musiin heart will fall into Rahim (the main character), who himself would have no idea of what is inside him. Somewhere else in another world called Xlus kingdom is invaded and their kingdom will be taken, they only need someone to save their world and the one who can download that is a person with a Munchun heart. 
The people from Xlus kingdom will come to earth so that they take three swords that were hidden many decades ago (At the moment Tsein has four swords that were hidden in Xlus kingdom). 
Their journey to earth they will discover that there is a man on earth who had a Musiin heart. 
They will join together and start their adventure to look for the remaining three swords. 
Here they will succeed in taking one sword from Mexico and another sword from Eastern Africa, as they took the sword from Eastern Africa, Rahim was hurt from the explosion. They will move back to the hidden city (They hid themselves there to escape Tsein), where he will be cured. 
In the Xlus kingdom, Tsein was struggling to repair the ships so that he can move to earth and take the remaining three swords do that he can have all seven swords which will male him immortal and undefeated, before he was prisoned in the special prison called dimension of time many decades ago but someone unknown unlocked him. 
Rahim and the Princess had to move to the Xlus Kingdom so that they can fire up the ship industry so stop Tsein from moving, unfortunately they will betrayed by the uncle of the princess and they will left alone on the Xlus kingdom,he will cut off the connection between the princess and her soldiers as they war continued, he will retreat all the army and left the princess and Rahim alone on the land to war,the princess and Rahim will face Tsein while they are incapable of fighting him (At the moment Rahim had not yet discovered how to use and control his power but he learned few moves before but his few moves are nothing in front of Tsein) 
The uncle of the princess wanted to inherit the kingdom as the king, so he left the princess as he knew he couldn't escape Tsien. 
The woman called Santra who is the closest friend of the princess will notice the whole plan of the uncle, she will secretly take the ship from the hidden city to the land of war to save her princess. 
At the last hope when the princess is down with Rahim, Santra will appear so fast and take them away by her ship. 
But on their way to return to the hidden city, the uncle was always watching them. He will attack them, their ship will fall down in the unknown universe. There lived weird creatures with different shapes (aliens). 
In the hidden city, the uncle will be sworn as the new king of Xlus while the people believed that the princess had died already and the only royal blood remained is the uncle. 
It's just first arc..

Table of Seven immortal swords

Table of contents

Volume 1