Tomoki Sakurai is the main character in Heaven's Lost Property. He is a total pervert who likes panties and boobs. His quiet life changes forever when he meets Ikaros, a Pet-Class Angeloid that has fallen to Earth from the mysterious world of Synapse that orbits around Earth in the sky.
A caring, highly perverted teenager who tries to maintain a quiet, peaceful existence along with maintaining his various perverted schemes around Sorami, Tomoki Sakurai constantly finds himself getting into bad situations with the girls around town, especially with his busty childhood friend Sohara Mitsuki.
Tomoki Sakurai was created by Suu Minazuki, and he has no information regarding any inspiration as to why he was created. He first appears in Heaven's Lost Property #1 and in Sora no Otoshimono Volume One.
Heaven's Lost Property the Movie: The Angeloid of Clockwork
The first movie in the Heaven's Lost Property series, The Angeloid of Clockwork supposedly focuses on the Hiyori Arc from the Sora no Otoshimono manga.