The Space Age: Invincible from My First Sign-In

Earth merged into the Milky Way, becoming the 1,000,001st life-bearing planet and ushering in the age of the universe. Humanity expanded into new frontiers, constantly battling monsters and alien races. Warriors were the backbone of humanity.

Su Chen was an adopted orphan. His goddess-like older sister and his adorable younger sister both awakened as warriors, while he couldn't awaken at all. After an accidental death, he was reborn one year in the past and activated a sign-in System. As long as he signed in, he could receive all kinds of cultivation resources and wondrous treasures.

Ding! Sign-in successful. Reward: Eternal Divine Body.

Ding! Sign-in successful. Reward: Chaos Origin Weapon.

Ding! Sign-in successful. Reward: Lightspeed Spaceship.

Ding! Sign-in successful. Reward: Divine Sense Secret Art.

With his sisters protecting him, all he wanted was to quietly sign in and cultivate. But then, Earth, with no Saints to defend it, was about to become an interstellar battlefield. Su Chen had no choice but to step in.

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.