Sayounara Ryuusei

Ryuusei and Chiro are brothers who have opposing characteristics. when they were hunting Ryuusei accidentally found a mysterious book when he took the book, suddenly a black aura entered his body which made him a cruel person and intended to rule the world.

Menceritakan kisah masa lalu Izza sang Putra Mahkota dan Liya sang Kandidat Dewi sebelum reinkarnasi ke Bumi. Berlatar tempat di Dunia Hampa, Tanah Cahaya.

Ryuusei might came from the bustling and urban city, but he knew his heart belongs to the serene and beauty of nature. Moving to the rural town made his heart flutter, and so far everything had sailed smoothly. Little did he know, still water runs deep.

Holders—humans who possess supernatural abilities through a partnership with creatures and entities called Cores. Upon coming of age, Holders summon their unique Cores as a manifestation of their own will, training their prowess and strengthening the bond between Holder and Core. Tsubasa Ryuusei, a teenage Holder who has undergone numerous trials and tribulations, aims to perfect his powers to protect those precious to him.