Mahou Sensei Negima! OVA Natsu (Anime OVA 2006)
Main Article: Negima! Natsu (Summer) OVA
A one episode OVA story. While practicing magic, Nodoka casts unknowingly casts a spell that literally ties she and Negi together by a thin red string of fate. The two are stuck together for the day until the spell expires – but what about bathing time?