This is a niche but highly appreciated topic among JAV collectors and visual novel fans. (formerly known as Megu Fujiura / 藤浦めぐ) has a specific set of “Mega Pack” or “Exclusive Box” releases that are often confused with standard compilations.
The exclusive packs are generally optimized for 4K or high-bitrate 1080p, offering a visual upgrade over older DVD releases. Availability: meguri megapack exclusive