According to Nitro+, a 12-minute OVA of recently ended sci-fi romance anime series Guilty Crown was announced.

Described as a prequel of the anime series, OVA will be bundled with PC adventure game “Guilty Crown Lost Christmas” and it is set to release of May 31.

Scrooge: Sakurai Takahiro
Carol: Asumi Kana
Past: Takagaki Ayahi
Present: Kobayashi Yuu

In 2029, Scrooge escapes from a research facility, where he had been confined as an experimental subject. His body was remodeled by genetic manipulations and he uses his psychic power to kill the chasers. One day, he meets another experimental subject called Carol. When three psychic chasers hunt down the two, Carol asks Scrooge to use his right arm to extract a weapon from her body.

Update (4/3/12): According to Nitro+, release of PC adventure game “Guilty Crown Lost Christmas” will be delayed from May 31 to July 26 due to “production” issues.

Sources [1] [2]