The Insects Unlisted in the Encyclopedia [図鑑に載ってない虫]

A freelance writer is given a bizarre assignment by the sexy editor of "Black Book Monthly": find a bug with the power to bring humans back from the dead, in order to report on the afterlife. With his trusty companion Endo in tow, he sets off on a quest for the elusive insect and along the way meets the mysterious Sayoko, a former dominatrix and habitual wrist-cutter who delights in rubbing wasabi into her wounds.