The Idea Pocket Official Site provides high-resolution galleries and official summaries for each release code.
This is a production code (also known as a "content ID"). In the Japanese AV industry, every release is assigned a unique alphanumeric code by the studio. "IPZZ" is a prefix associated with the studio Ideapocket , one of the major producers in the industry. azusa hikari a school ipzz387 doragon nishi