Tomoki is the main character in the anime (voiced by Soichiro Hoshi in Japanese and Greg Ayres in English), but Tomoki's first Angeloid Ikaros also plays a major part (voiced by Saori Hayami in Japanese and Brittney Karbowski in English). As more and more Angeloids make their way to Tomoki and escape the world of Synapse, Tomoki finds his life has been turned upside down, and peace and quiet are no longer and option. The ruler of Synapse is cruel and sadistic and enjoys torturing his Angeloids. Eventually, Tomoki discovers he may have a connection to the Angeloids' original world, Synapse, through his dreams. This Angeloid, named Ikaros, falls from the sky and chooses Tomoki to serve. One day, he encounters an Angeloid, an android meant to resemble an angel and programmed for submission and servitude. Heaven's Lost Property focuses on a young man named Tomoki Sakurai, who is described as "perverted" and spends some of his time as a peeping Tom, but mostly he just wants to live a quiet, peaceful life and be left alone. The show is based on a manga of the same name, written by Suu Minazuki. Although the second season was titled, Heaven's Lost Property: Forte, rather than simply Heaven's Lost Property, it is not a spin-off or remake of the story, but a continuation and picks up where the first season left off.
Heaven's Lost Property is an anime that ran for two seasons from October 2009 to December 2010, with a third season expected some time in 2012.