The Stompers

A young girl named Alice finds her classmates come under attack by a monstrous entity.

...

"Alice's attention was captivated by a faint murmur in the distance, luring her attention away from the boring English lesson, and towards the window. The rain fell dense and heavy, shrouding the world in a veil of gloom. But Alice was not saddened. Quite the opposite. She was hopeful the grass would feel better with those endless sheets of water pouring down.
Though, there was something unnatural about the downpour. Her eyes narrowed as she tried to look behind the rain. Something was making her feel... off. Something in the rain, or behind it. Just out of Alice's vision. She couldn't figure out why, until it got too close. In the distance, beyond the rain, a menacing presence that was moving directly toward her!"