The Twelve Zodiac Signs' All-Out Rescue

[Yuri is the main pairing, BL is secondary, plus one BG couple]

1. The Thirteenth Zodiac appears

2. Alternate-universe setting, plot-driven, somewhat mysterious, with supernatural powers and war

Since ancient times, the zodiac in the universe has consisted of twelve signs. For the sake of the zodiac's constellation stone, the Constellation Stone, which holds immense power, its possessor is nearly invincible. It rests in the Zodiac Star Realm, maintaining peace in the world and the universe. Whoever possesses the sacred stone possesses the world. To protect it, the twelve zodiac signs willingly took human form so they could better guard the stone. Many people coveted its power and waged war on the signs to seize it, but they were defeated. Whenever a new guardian inherited the role, the sacred stone, imbued with immense supernatural power, bestowed a fragment upon them. As time passed, the wars gradually died down, and the twelve signs remained in balance. Then Ophiuchus joined them, and Aries went missing, throwing everything off balance. There is a traitor among them, and the relationships between the signs have changed. No one trusts anyone... Who will uncover the truth at last?

Theme: A rescue story about overcoming internal strife, uniting, and fighting a common enemy