Short stories about the past from the girls of the manga Trinity Seven. Volume 1 - Takes place between chapters 38 and 39 of the main manga.

Arata Kasuga is living an ordinary life with his cousin Hijiri when a mysterious happening called a "Breakdown Phenomenon" makes her vanish before his very eyes. Determined to eradicate the Breakdown Phenomenon...

When humanity was threatened 5 years ago, the boy who saved the world was driven to despair and became regarded as the enemy of all of mankind. And now a new crisis approaches humanity. The curtain rises on a...

Gotta flirt to save the world! High schooler Takuma Akutsu is terrified of human contact and just wants to live a quite life. Too bad he doesn't have a choice in the matter when nine Valkyrie sisters come...

Nina the cat lost the Zodiac Race by one spot, and she's held a grudge for millennia. When she forces a divine do-over, unlucky student Cosmo Lee becomes the reluctant referee. His mission? Gather twelve Zodiac...