It's "White Day," the day that boys who received chocolates on Valentine's Day give their return gifts to the girls. And Momiji has one big surprise gift for Tohru!
She gave the last demon her eyes.
Le dio sus ojos al último demonio.
Et il donne ses yeux au dernier monstre.
Ela deu os olhos ao último demônio.
Напоследок у него забрали глаза.