A trap disguised as a mircale

What would you do for Money?

Minatozaki Sana, doesn't come from a wealthy family but she, her twin sister Momo and younger sister Mina, live happily with their grandmother.

That is until Momo's debt loaner threatened to kill her if she doesn't repay her $150k back

When an opportunity of a "job" came to her with a payment enough to cover her sister's debt, what will Sana choose?