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Stanley Corporation retrieves items at the request of its clients but sometimes the owners give difficult challenges to even just talk to Stanley Corp. They enlist the help of Manjou Yuki, a senior in high school with 99% success rate on a popular internet puzzle site, to help them tackle these challenges. To sever the Gordian Knot is to solve the challenge in an unheard-of way. Join Manjou Yuki in his exciting journey of high-risk challenges and games.