Gunbuster 2: Diebuster is a oVA anime that premiered in fall 2004, produced by GAINAX.

About the production: the story comes from an original script, there are 6 episodes of about 30 minutes and its current status is "finished".

Its main genres are action, comedy, mecha and sci-fi, with themes such as Super Robot, Female Protagonist, Space and Cosmic Horror.

On AniList, Gunbuster 2: Diebuster has an average score of 74%, a good score, and appears on 26,465 users' lists.

The franchise continues in or follows from: Top wo Nerae! GunBuster and Top wo Nerae 3! (Provisional Title).

While Gunbuster's final mission destroyed the space monsters' star system, the intergalactic war still continues. Earth's only hope lies in the hands of "TOPLESS", an elite mecha group with children possessing supernatural powers and new Buster Machines. Among their ranks is a rookie named Nono and the ace pilot Lal'C - whom Nono looks at as a "big sister". Together with their teammates Nicholas and Chiko they must aim for the top and protect all of mankind from the wrath of the space monsters. (Source: Anime News Network)

Official synopsis from AniList.