Serie includes 148 albums .
Oikari Nia-chan
Omae no Drill de Nani wo Tsuku!
One Shot Bomber
Oppai Ginga Yokochou | Galactic Boob Alley
Oppai Yoko-san
Oppai Yokochou
Oppai Yokochou | Boob Alley
Otona Aniki
Otona no Drill
Over Limit
Pirokore Lagann