[Machine Translation] Beware of cute rats! Kenichi is asked by Princess Lilith to exterminate rats in the basement. Kenichi's secret plan to deal with the unexpectedly large number of rats is to use poison. Using his modern knowledge, Kenichi will face the princess's challenge...! A popular slow life in another world that makes full use of a mail-order site. Exterminating rats, exterminating ghosts, and even getting a reward from the princess...? The 7th volume of the series is a tale of a mischievous princess!