Gakuen of the Dead | 学園・オブ・ザ・デッド

Reunion is accomplished with childhood friend Akane Makabe after three years, two of them on the rooftop in school. It is confessed on the spot by Akane, mutual love is confirmed, it was good until the kiss... Suddenly the zombies overflows in the town, it began to attack the people in the town! It becomes only a zombi in the building of the school.

According to the old man of Akane who was able to contact by telephone, though the cause doesn't understand "Queen" there seems to be a person controlling the zombies. If you do the queen somehow, being able to do escape safely possibly!