Disclaimer: Oniisama e and all characters therein belong to Ikeda Riyoko. I'm just borrowing them for nefarious (but nonprofit!) purposes.
The title of this drabble comes from a poem by Verlaine, one which is quoted in Oniisama e. Original French: Il pleure dans mon coeur/ Comme il pleut sur la ville.
Warnings: fairly heavy spoilers for late in the series.

As it Rains in the City, So, Too, Do the Tears Fall in My Heart

Nanako is crying.

She doesn't feel the rain that's falling all around her, soaking her, nor does she feel the chill.

What she does feel is embarrassed, upset, shattered, alone. They were all right. Miya-sama has been lying to her all along.

That must mean that her words today were all lies, too. "I'm in love with you. You were so cute, on the day of the Entrance Ceremony, I just didn't know what to do..." All lies.

The commanding touches, the aggressive seduction, the gentle finger smoothing the lipstick over her lips, the soft lips moving against her earlobe; None of them were real.

For a few short moments, Nanako truly believed that this incredible woman loved her. It was not a happy feeling, really, more a sense of awe intermingled with confusion and a touch of fear.

But that doesn't matter, because she knows the truth now. It was never about her. She was only ever special in Miya-sama's eyes because of her Onii-sama.

And Saint-Just-sama... Miya-sama will always come first in her heart. Nanako knows that. But it still hurt, today, to be treated like a mere thing by her, as though the touch of Miya-sama's lips on her had been more important to Saint-Just-sama than the sum total of her existence. She was a mere vessel to her, like the straw in a glass of soda. She'd thought she meant more to her than that, but now she isn't sure. Will there ever be a place for her in Saint-Just-sama's heart?

Nanako had her first kiss today; Her first two kisses, really. And she is crying.