In case you are curious about the release schedule, the DVDs of Bokusatsu Tenshi are out every 2 months on:
DVD Vol.1 (ep1-2): 25 March
DVD Vol.2 (ep3-4): 25 May
DVD Vol.3 (ep5-6): 22 July
DVD Vol.4 (ep7-8): 22 September
Licensed This series is licensed and has been removed from the site (more info).