Has Yokohama's Causality Weapon Been Dumped?

Everyone at the port group knows not to speak carelessly in front of the new executive, Nishitani. If possible, it's best not to say a word at all.

First, a slip of the tongue cost Executive Nakahara a whole garage full of sports cars. Then Executive A said, "If you betray the organization, you'll die a horrible death," and doomed himself to die in the basement.

No one wants to test the power of the ability "Keeper of Promises," especially since it often activates on its own.

You never know which of your words might be deemed a promise, or when you might accidentally break one and suffer the consequences.

But that's all right. Someone is always brave enough to face the sharp edge of cause and effect.

*

The newly appointed Executive Nishitani has been quite troubled lately.

He's certainly ambitious, but even while working hard to earn his executive position, he could still enjoy a little romance as a break from his busy schedule. But for some reason, his lovers keep becoming exes in all kinds of bizarre ways.

For example, his former business partner and ex. His former coworker, now a rival, and ex. His former business contact and ex...

Being dumped by an ex who's just been struck by terrible misfortune is never a pleasant experience. But when all is said and done

Nishitani Yuria slowly gave a terrifyingly gentle smile to the next "ex" lying battered and bruised before him. "Even if we give you every possible benefit of the doubt, why can't you keep every promise you've made to me?"

A certain dark-skinned police officer, about to become an ex: ...This might be a little difficult.

*A professional ex, dumped for a hundred years running (just kidding).

*Nishitani has the qualities of a male ghost. His top or bottom role depends on the personality of his exes, and he sometimes switches. But with his one true love, he's the bottom, so this is listed as a bottom-led story.

*One-on-one relationships at each stage. See the supporting cast list for the exes. More may be added.

Theme: Keep your promises.