Koisuru Asteroid: Kirakira Zoukan-gou
Japanese title: 恋する小惑星 「KiraKira増刊号」
Type: ONA
Episodes: 12
Source: 4-koma manga
Duration: 44 sec per ep
Rating: PG-13 - Teens 13 or older

Mini anime of Koisuru Asteroid where characters explain astronomy and geology. Later included in the Blu-ray/DVD.