The world is reaching to the end as it is covered in deep snow.
Two mysterious girls, different yet similar, have been summoned from a place called Terminal; an empty and monochrome post-apocalyptic world in the future.
Escha is a girl who has bright smile like midsummer sunflower, and has a very curious nature.
Chron is a girl who is gentle yet mysterious like a moon.
They call the world of current era Transit and somehow the world is changed by getting in contact with the world’s scenery, music, and people.