Natsume is on his way home when he finds a letter on the ground. The letter seems to belong to a nearby man, who asks Natsume to take him to his school. The man is actually a youkai, who was once deeply involved with a human girl. He cut the relationship off, but the girl isn't ready to give up...
Please solve the math problem below to unlock download mirrors for Natsume's Book of Friends.
Links are proxied and may take a moment to start.