Blacki Reika, a news announcer working for a television network, secretly holds the unexpected identity of Melphu Dark Angel, the pitch-black angel. Having just returned to Japan from France, she is immediately called to a live broadcast, only to find enemy combatants from the opposing organization, Dantalion, lying in wait. The Japanese Melphu forces are caught unprepared, revealing their utter helplessness against the invasion, leaving Blacki deeply disappointed by their incompetence. However, she chases down the enemy soldiers and transforms into Melphu Dark Angel, successfully defeating them. Yet she soon finds herself surrounded by reinforcements. To escape the crisis, she activates her special technique "Paradish Charm," seducing the enemies and turning them into allies. Evading danger, she finally reaches the enemy base—but the story concludes with an unexpected BAD END.