The Magnificent Kotobuki Side Story: Harukaze Squadron in the Sky - Season 1 Episode 5 The Ruthless Girls' Day Out

Harukaze Squadron gets hired for guard duty at an airfield. They have no idea what it is they're suppose to be guarding until they come face to face with the famous Kotobuki Squadron. After getting over their initial shock, they start talking about the history of the basin the airfield is situated in and how it used to be a vast ocean with water as far as the eye could see in every direction. From there, the conversation takes a turn for the weird with stories about ancient clothing known as swimsuits and which fighter plane each of the girls best represents.