Angst-ridden college student, Nanase Nobata, lives with her father, Hakaru, president of the Nobata Pharmaceutical Company. Resentful of his constant nagging about her life, she urges him daily to “Drop dead (once)!” - until, one day, he does drop dead while developing a revolutionary “reverse ageing” drug. But all is not as it seems: the drug only causes ‘temporary death’, followed by a full recovery after two days ...