An introverted cosplayer, Koromo Kuroi, is flung into a fantasy world?! With dreams of opening her very own costume shop, she sets out on a quest to earn enough money to turn that dream into reality!

By chance, Marina Katsuragi crosses paths with the creature known as Aramaki and gains the ability to transform into Magical Girl Pastel Marie. A magical girl's duty is to close up dimensional portals that occasionally appear. However...

Arriving in a scenic town filled with flowers, Sho and Ren encounters Haru and the others working at a café. Taking up residence on the second floor, Sho begins working alongside them. But one day, he spots Haru sneaking out alone in the dead of night and decides to follow her----