Invaders of the Rokujyōma!?

Invaders of the Rokujyōma!? (六畳間の侵略者!?, Rokujōma no Shinryakusha!?, lit. "Invaders of the Six-Tatami Mat Room!?") is a Japanese light novel series written by Takehaya and illustrated by Poco. HJ Bunko has published seventeen volumes since 2009 under their HJ Bunko imprint, as well as two side story volumes. A manga adaptation with art by Tomosane Ariike is serialized in Hobby Japan's online seinen manga magazine Comic Dangan. A 12-episode anime television series adaptation by Silver Link aired between July 11 and September 26, 2014.

Plot
Due to young Koutarou's financial circumstances, he is forced to live in a small rokujouma (6-tatami apartment) on a budget of 5000 yen a month. On the plus side, he lives rent-free, but on the minus side, that's because room 106 of Corona Apartments is cursed. The ghost is a cute young girl, and hijinks ensue when she tries to drive him out. Between the haunting, Koutarou's nosy neighbors, and a self-styled magical girl flying to the unneeded rescue, there's way too much for the impoverished young man to handle.