((About one month ago, an earthquake split the city Kaldesta, leaving behind a massive chasm. At the bottom lies a mysterious structure... With rumors that this ruin holds a "forbidden tome", the Magicians' Guild dispatches the young prodigy, Erika, to retrieve and seal this taboo magic.))

Before leaving, Erika requested her childhood friend, Sero, accompany her.

Erika:"Come on, Sero! I expect you in top condition tomorrow during our survey."