Romance is, after all, just a way to kill time.

There are a man and a woman who believe exactly that.

Ibuki Naruse has never had trouble with women. He knows how to be kind and how to whisper sweet words, because he knows exactly what women want to hear.

However, he has never truly loved anyone.

Guest was the same.

She liked being loved by men. She was happy to be told "I love you." But she was afraid of loving someone herself.

That is why both of them treated romance as nothing more than a game.

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Then, these two met.

At first, they both intended to use the other.

"I'll get bored soon anyway." "There's no way I'll get serious." "He's the one person I'll never fall for."

That is what they thought.

That is why, at first, they refused to acknowledge the feelings growing between them as love.

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When Ibuki is with another woman, for some reason, Guest gets angry.

When Guest talks to other men, Ibuki finds it incredibly irritating.

"It's not like I like them."

"It's just a game."

While telling themselves that, the other person's presence gradually grows larger.

Even though they could have easily discarded anyone else before.

Even though they wouldn't have cared about hurting anyone else before.

This person is the only one they don't want to lose.

The moment they realize that, their "game" ends.