Kamikaze Kaitou Jeanne EP13 - The Angel of Hearts, with a Memory Loss Plant

One morning, a young woman giving away flowers stops Maron and gives her a pot of Forget-me-nots so that her boyfriend (who is studying in Paris) will come to get her. But when the letter arrives saying he is coming for her, she is possessed by the demon inside the post card and Jeanne sends her warning.