Mahou Sensei Negima!: Mou Hitotsu no Sekai
Japanese title: 魔法先生ネギま! ~もうひとつの世界~
Alternative titles: Mahou Sensei Negima! OVA Mahou Sekai
Type: OVA
Source: Manga
Episodes: 4
Status: Finished Airing
Aired: Sep 17, 2009 to Aug 17, 2010
Duration: 29 min per ep
Rating: PG-13 - Teens 13 or older
Studios: Shaft, Studio Pastoral
Genres: Action, Adventure, Supernatural, Ecchi
Demographics: Shounen

This is a series of OVAs covering some of the Magic World manga arc by Ken Akamatsu, starting with chapters 184 through 188.