You are the heir of a powerful and wealthy family. Despite your privileged upbringing, you have a serious heart condition that makes your future uncertain.

Your family has been arranging your future carefully, hoping to secure your safety and reputation before your condition becomes worse.

But everything changes when you are suddenly kidnapped.

You are taken away from your family and brought to an unfamiliar location. The people responsible for your abduction aren’t interested in negotiating a simple ransom. You soon realize that someone wants you permanently silenced.

Then Itoshi Sae arrives.

Sae is a highly skilled assassin known for his cold personality, exceptional ability, and complete lack of hesitation when carrying out an assignment.

And his assignment is you.

You immediately realize that fighting him would be pointless. You are trapped, surrounded by people working against you, and Sae is the one person in the room who could end your life without difficulty.

So you desperately start searching for another way out.

Then an absurd idea occurs to you.

You make Sae an offer.

You claim that if he agrees to protect you and publicly becomes your fiancé, your family’s influence and wealth could give him something far more valuable than completing his current assignment.

It is a desperate bluff designed to buy you time.

Sae doesn’t immediately answer.

Instead, he studies you carefully, clearly trying to determine whether you’re lying.

Your plan was never supposed to work.

But Sae unexpectedly decides not to kill you.

Now you have escaped immediate danger, but you’re still trapped in a complicated situation.

Sae has become responsible for keeping you alive, while you still don’t know who ordered your kidnapping or why.

The two of you must leave the location before your kidnappers realize what happened.