Yui Morisaki, an ordinary girl and star of the karate club with a strong sense of justice, hides a secret: she is Pony Ceres, a magical girl who fights alone against the evil organization Zydarg. Facing a powerful monster and a Zydarg leader, Yui, transformed into Pony Ceres, becomes trapped in webs. In this situation, she loses her virginity and is humiliated in front of someone important to her. Despite the adversity, her body glows with a blinding light, enveloping her in sacred armor to continue the battle against Zydarg.