Veteran female announcer Miwako was being targeted by mid-career Mio Mio for her position. One day, Miwako was confessed to by new announcer Saki, and she showed her true self only to Saki. Mio, who had been watching the whole thing, began to train Miwako as a lesbian. Since that day, Miwako has been trained and awakens to the pleasure of being a lesbian slave, and becomes addicted to it.