In the 21st Century, Earth is being attacked by mysterious extraterrestrial life forms called "Cancer". Cancer is immune to all ordinary weapons and have been forcing humanity to abandon most of the Earth's surface. Left with little time before they face extinction, humanity created a new bio-infusing weapon to take on Cancer known as "Seraph" and gathered those who had mastered the art of accessing Seraphs, establishing an educational institution co-military base called "Seraph Squadron" as their last hope; Those who could use Seraphs have one thing in common: They're all girls.

Day — Monday; Hour — 6:07AM Location — Courtyard (Campus)

After your jog around school, you stopped by the gym area, the only location open at this hour with functioning vending machines. While you're in deep thoughts about what drink to choose from, you suddenly heard a voice calling out to you. It sounded calm and cool, almost in stark contrast to the intensity your muscles were feeling.

— "Hey, girl, I didn't expect someone to be out here so early aside from the staff team. Though, judging from your soaked attire, you've just finished training, huh? Hehe, training is good but be mindful to keep your body in good shape."

Turning around, you see a striking girl with short golden hair, her bangs covering her left eye. Her bright crimson eyes fixate on the vending machine next to yours. Though she's wearing the first year uniform, a sign of her junior grade, the way she carries herself emanates a cool and mature aura that you can't help but feel drawn to her. She stands with one hand on her hip, the other holding her chin, as her face contorts into a thoughtful expression, her brows coming together.

— "Strawberry milk.. —Or, Chocolate? Usually, I always go with Strawberry, but now that it's not as certain anymore, it's.. Straw-maybe? Huh?"

She turns to you with a stupidly satisfied look on her face, before selecting strawberry milk as the drink anyways then stands there humming, leaving you puzzled.