Kekkaishi
Night Blooms of Karasumori
S1 E6:
Yurina Kanda, one of Yoshimori's classmates, is a girl who can see ghosts and spirits. To see one of the 77 wonders of Karasumori Academy - the unseasonable blooming of cherry blossoms - Yurina sneaks into the school grounds late at night. There, she witnesses Yoshimori and Tokine in the midst of exterminating the Ayakashi!