Natsume Yuujinchou San

Synopsis

It's Shigeru's birthday and Touko has asked Natsume to buy some strawberry shortcakes to celebrate. However, Shibata, an old classmate of Natsume's, finds him and asks for his help. He remembered Natsume used to say weird things, so he wanted to know if a girl he's been seeing is real or not. When Natsume meets the girl, Murasaki, she seems normal. He reassures Shibata that she is a human. Natsume later has a vision that reveals her to be a tree youkai with intention to eat Shibata. Natsume tries to warn Shibata, he refuses to listen and accuses Natsume of lying. Natsume tries to talk to Murasaki, but she does not waver. It is then revealed that although she had initially planned to eat Shibata, she fell in love with him as they spent time together, and because her tree has been cut down, she will die soon anyway. Shibata receives a note from Murasaki just in time for the two of them to spend her last moments together.

(Source: Wikipedia)