Countdown 7 Days(2009)

Countdown 7 Days

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?

(Source: DMP)

Included one-shot:
Volume 1: Susukaburi