Maria Watches Over Us 3rd Season OVA - Don't Tell Mother Maria.
Maria-sama ga Miteru: 3rd Season OVA - Maria-sama ni wa Naisho. · マリア様がみてる～3rdシーズンOVA～マリア様にはないしょ。
Synopsis
A series of chibi-style "outtakes" from the "shooting" of the Marimite series.
Studios: Studio DEEN, The Right Stuf International
Source: LIGHT_NOVEL