THE TALE OF UNDERCRUST ~The Last 7 Days of Hasumi~

Hasumi meets an android who claims to come from the future in a smattering of language, making her skeptical. In order to avoid a meteorite impact that is scheduled to befall seven days later, the two go deep into a huge crater lies at the foot of Mount Fuji. Herds of weird creatures live in the underground world which, perhaps, will have either a girl vigorously brandishing a sword or……