Invincible! This person has lived for a billion years - Chapter 25: At your fiercest age, you meet the fiercest you.

He kept her by his side, never letting go! “Please, can you let me go?” “Impossible,” he said, “unless you're no longer my only one.” After they fell in love, he declared possessively, “I want to keep you by my side, to make you belong only to me. You can only love me too, your mind, your world, must be filled with only me.” Yet his domineering love sent a chill through her.

Being a Divine Doctor is very troubling, but being an invincible Divine Doctor is even more so, because there are just too many patients. Tangyu simply couldn't cope with it all!

In a world heavily dependent on technology, humanity always strived for more. And when they transferred the human consciousness into a virtual world, everything changed.

People got different systems, some unlocked superpowers while others simply became stronger. There were all kinds of things people obtained, and they all came from an unknown world later named “System Online”.

A virtual world that allowed people to get stronger as they played in the world in a manner that altered their destiny, raised their strength, and gave them a chance to be what they never were.

Follow as the main character enters this world to change his destiny and help out his loved ones. However, never did he know that he would become someone at the center as the whole world faces doom.

Read how this world of System Online becomes the cause of the apocalypse on Earth a hundred years later while a new even more vast universe opens up to humanity while the world of System Online descended on Earth as both worlds merge in some unexpected circumstances.

This all leads opens to Universe where humanity's survival hangs at the stake.

A universe where humanity is at the bottom and countless races eye Earth for its resources and treasures.

A universe where the strong prey on the weak.

Based on the popular Vocaloid song .

Rin, a young angel (presumed female, but angels don’t have clear genders) falls in love with a young human girl, Miku. However, their love is considered taboo, and so, Rin makes a deal with the devil to be reborn as the human boy, Len, in order to be with Miku. However, their happiness together is short-lived, and even that soon ends in tragedy.