Tetra's Birthday Bash, part 1

In a world where humanoid monsters with magic powers run rampant with no humans around, an eccentric duo consisting of the cheerful, geeky strawberry cow girl Sorrel Fragaria, and the reserved, delusional wendigo girl Tetra Psyche, were summoned to modern day Earth.

After spending about three years there, they've managed to return to their original world, and back to their middle school days. But having 'borrowed' some technology from the humans, and with decent knowledge of it, they combine technology and magic to build a time machine.

Things did not go to plan, however, as they are now stuck in a never-ending time loop of the same Thursday, Friday and Saturday. How many bizarre, whacky journeys will they embark on in this loop? Well, time to find out!