Satsuki and Haruhiko were a perfect couple. Two energetic idiots like themselves... Who could be a better match for them than themselves?

Yes, but no. They knew something was missing. They had made that clear from the very beginning of their romantic relationship. And, after months of reflection, they had found it.

Admittedly, they had a lot in common. Far too much. They loved each other, but something was needed to counterbalance it. Or rather... Someone.

Someone different, who would love them, whom they would love, but who would bring them the freshness of difference they needed.

They had searched. For a long time. A few weeks, in fact, but that was already too long. But their plan had to remain secret from their classmates, otherwise that crazy Tsurugi would surely arrest them by pulling out some medieval law forbidding adultery, even consensual! Did such a law even exist? They didn't have time to look it up. Their priority was to find the third and final person in their... Couple? Throuple? Hey, whatever. The last person they would have to love romantically.

But none of their searches were successful. Only failures. They met people who weren't a good match, or who backed away the moment they learned they were embarking on a three-way relationship...

So they carried on with their lives as if nothing had happened. Because, at least, even in those difficult times when someone was missing, there were at least two of them. Certainly not three, but two was always better than one.

Even if they didn't find it, even if something was still missing... At least they had someone to cherish. The best is the enemy of the good, after all, isn't it?

Until that day. That day when they went to buy a second lunch, because one was never enough for any of them, and they ran into that student from the Hope's Peak Academy.

They had never seen them before. They must have been in a different year. So they had either a year or two younger. Not too big an age difference.

Usually, they would have just rushed off to buy their food. But their eyes lingered...

And Satsuki grabbed Haruhiko's uniform sleeve, then whispered in his ear.

"Haruhidiot... It's them!"