Daughters of the Deep- Chaelisa and Jensoo.

"Even in a place that killed my family, you made me feel safe...you didn't die and I'm thankful for that"

Generations of Lisa and Jisoo's family have attended the legendary Harding-Pencroft Academy, where the best underwater explorers in the world go to train. When the sisters witness a tragedy, their life at school and beyond is changed forever. Turns out that Harding Pencroft and its rival school, Land institute, have been fighting a cold war for a hundred and fifty years- and it's just turned hot.
Pursued by enemies, Lisa and Jisoo make memories bad and good, and some downright tragic. With rumors flying around, can they really trust anyone but themselves?

Adapted from Rick Riordan's 'Daughter of the deep.'
Chaelisa and Jensoo.
Special appearances- Twice, Mamamoo, Seulrene.