Miyu Sugiura and Masahiro are happily preparing for their upcoming marriage when suddenly they face a major financial crisis. Masahiro had once been a guarantor for a friend who has now vanished without a trace, leaving the lender demanding repayment. The lender turns out to be the president of the company where both Masahiro and Miyu work, and he proposes a disturbing deal in exchange for clearing their debt. This arrangement will drastically alter the course of their future.