The manga series Heaven's Lost Property (Sora no Otoshimono) begins publication by Suu Minazuki.
The first season of the Heaven's Lost Property anime is broadcast in Japan.
The second season of the Heaven's Lost Property anime, titled Heaven's Lost Property: Forte, is broadcast.
Suu Minazuki's Heaven's Lost Property manga series concludes publication.
Tomoki first encounters the Angeloid Ikaros who falls from the sky and becomes his servant.
Two more Angeloids, Nymph and Astraea, are introduced and join Tomoki's household as servants.
Tomoki learns about the existence of Synapse, the mysterious dimension from which Angeloids originate.
Sohara, Tomoki's childhood friend, grows closer to him, becoming part of his daily life.
Ikaros undergoes significant damage in a battle, revealing her limited emotions and vulnerability.
New human characters Mikako Satsukitane and Sugata Eijiro are introduced, revealing more about Synapse.
Tomoki learns how to control and command Angeloids using a remote control system.
Ikaros starts developing feelings and questioning her identity beyond being an Angeloid.
Tomoki and friends travel to Synapse to confront Angeloid Governors and uncover secrets behind Angeloid creation.
Tomoki and the Angeloids reach an understanding, focusing on friendship and coexistence between humans and Angeloids.
