Ah! An Exchange Diary With the Goddess?

More goddess-related system problems arise because of Belldandy's unstable heart. A new girl shows up at the temple, and it's Belldandy's kid sister Skuld! She's there to deal with the outbreak of bugs but also has an ulterior motive, to bring Belldandy back to heaven. To complicate things, Skuld's bug blasting invention isn't working and is doing all sorts of weird things. Can Keiichi and Skuld repair the machine in time or will Belldandy have to return to heaven?