In her teenage years, Reiko was granted divine power to fight as a heroine of justice. She finally met her life partner and lived happily. One night, due to carelessness, her identity was discovered by her younger brother. For some reason, memory manipulation with magic didn't work, and he even had evidence. He demanded 'mature flesh' as hush money. Reiko was forced to make a bitter and taboo choice. She was transformed into a sexy battle costume and challenged her younger brother to a sex technique duel. 'Now, you'll keep your promise, big sister. Hehehe...' [BAD END]
