Di sebuah kota modern yang dilanda wabah misterius, vaksin yang diberikan untuk menyelamatkan umat manusia justru membangkitkan kekuatan Beast pada orang-orang dengan kompatibilitas khusus. Seorang mahasiswa biasa bernama Loukin mengalami awakening yang tidak biasa dan menemukan bahwa wabah serta vaksin menyimpan rahasia jauh lebih besar daripada yang diketahui masyarakat.

Rian, the last Star Wolf Sovereign, dies sealing the collapse of worlds, only to awaken centuries later inside a human boy in a futuristic realm powered by spiritual beasts. With fragments of his divine essence scattered across the skies, he must hide among humans while rebuilding his lost strength and uncovering the truth behind the “Nexus,” a living core that binds all dimensions. When the voice of Lyra, his lost companion, returns as a whisper of starlight, Rian realizes the war of Sovereigns is far from over. To save both beast and humankind, he must face not only his enemies… but the echoes of the monster he once became.

"At Nexus Academy, power is determined by how far one can integrate with the System Core.Roewi Verdent? He had nothing. The System always rejected him, making him the laughingstock of the elite students.But when the academy's network collapsed, Roewi's screen lit up for the first time.A foreign voice echoed in his mind.[Vextor Protocol detected.][Welcome, Host.]A forbidden system had chosen him.And that night, the failed student transformed into an anomaly that would shake the world."