To Love Ru Darkness manga volume 14 features story by Saki Hasemi and art by Kentaro Yabuki.

Even if she's expected to recover, Lala is still stuck in a pint-sized body-and she resolves to do something about it. Unfortunately, her invention goes totally haywire, shrinking Rito and Haruna down to be even smaller than she is! So small, in fact, that they could easily be stepped on. What's worse, Haruna's parents are coming home to visit. Everyone's going to need to work overtime to keep this mad-science mishap a secret!