Yuusuke had just started living on his own when he met Noelle, and her family moved into his house. Making matters worse, Noelle is attached to him, and keeps him from Natsumi, the girl he likes. He writes a letter to Natsumi, saying that she is his angel. She rips up the letter, but Noelle vows to become his angel to try to make him feel better. He constantly gets into mishaps caused by Noelle and her family, and is unable to reach Natsumi. Can he get to Natsumi without hurting Noelle?