Lonely Mitamura may be a teacher at the exclusive Sheol Soul School an academy dedicated to the afterlife but he has a lot to learn about human emotions and helping others. In fact, his star pupil Tsuru thinks she'll teach him a little lesson by running off during a field trip in the living world. Now, Mitamura has only seven days to track Tsuru down with the help of a brand-new (deceased) sidekick. Will the clock run out before they find her?
Countdown 7 Days proves that the afterlife is anything but normal! Mitamura may know how to help the newly departed properly reincarnate into their next life, but he's at a total loss when it comes to understanding why others want nothing to do with him. But when a mischievous student takes it upon herself to school her teacher in the ups and downs of friendship, Mitamura may finally learn the value of life...after death!