Whenever I enjoyed having watched an anime or played a particular game, there's always a tendency for me to get something tangible related to the source of entertainment and I guess most otakus would have soft-spot for this highly oppai mini bust of Ikaros from 'Sora No Otoshimono' aka 'Heaven's Lost Property'. Ikaros was introduced as a busty Pet-Class Angeloid type Alpha "Pet-Class Angeloid, Type Alpha" who became bonded to Tomoki after he had rescued her from her fall from the sky at the beginning of the story. The bond was symbolized by the mostly invisible chain that leads from her collar to Tomoki's hand. She displays a very submissive, melancholic and subservient personality as shown on the sad expression of this bust.
It's supposedly a not-for-sale item that came as a furoku (goodie appendix) tied with December 2010 issue of Shonen Ace magazine about manga. This PVC mini bust of Ikaros was manufactured by Kaiyodo and measured approximately 4.5 cm in height and came in a cardboard box package with hawaii pinko plastic sleeve. One of the very first Sora No Otoshimono merchandise closed to trading figure before any doyasha related to the anime was released.