Touka Gettan Season 1 Episode 17

Moon

Makoto awakens after a strange dream and is feeling sick. She manages to go to school, but while there, she loses most of her energy and nearly falls unconscious while on school grounds. Shōko finds her, and brings her to the nurse's office, and before long a white light starts glowing around Makoto's stomach. At the same time, Sei within Momoka, Juna within Yumiko, and the stone sword within Tōka awaken for a brief period; Makoto's own dragon within her also awakens. Afterwards, things seem to go back to normal, and the nurse writes off the circumstance as Makoto experiencing her first menstrual cycle.