Yuushibu is in my opinion the most under-rated ecchi anime of 2013. It had a novel concept, good production values, a solid soundtrack, likable characters, and a fun vibe. And when it came time to deliver fanservice, Yuushibu didn’t hold back, either.
Sure, this anime could have been more than it was, but in the end there was more than enough service and nudity to make for a pretty good compilation video.
Dragoon was released as a three episode OVA in 1997. Back in the 80s and 90s TV series nudity was relatively rare, so to compensate anime companies would go the extra mile on their straight to video efforts.