If you've ever watched any good mystery, there's a good chance you've missed certain important clues and been completely shocked when the mystery is finally solved.

But every good mystery gives you all the clues you need - you only need to know which clues to focus on.

For fans of "The Perfect Insider" anime, there's a new trailer now streaming only that gives you all the clues you may have missed in the first six episodes. The trailer was revealed as a celebration of the new anime box set that is being released in Japan ahead of a later planned box set.

Based on the release materials, fans are hoping that "The Perfect Insider" anime Blu-ray/DVD box set will be released outside of Japan.

"If sales go well, hopefully this will get released in the states as a collectors set. Hopefully, not at fate prices," said Euraiya on Crunchyroll.

Crunchyroll reports that "The Perfect Insider" anime box set in Japan will include original box art by character designer Inio Asano, a soundtrack CD, and a Four Seasons audio drama. This box set was reportedly released before the official Blu-ray/DVD planned for February, 24, 2016.

For those who are not familiar with the series, "The Perfect Insider" anime is based on the award-winning murder mystery novel by Hiroshi Mori. Crunchyroll is currently streaming the series for fans outside of Japan.

My Anime List describes the story of "The Perfect Insider" anime series as follows:

"The story of the original novel revolves around Souhei Saikawa, a member of the Saikawa Research Lab. On a vacation held for the lab, he meets Moe Nishinosono, the daughter of his mentor, who joins the group on their vacation despite not being a part of the lab. After meeting each other, the two end up finding a corpse. The two work together to solve the mysteries of what becomes a serial murder case."