The term "mysterious series" is not a commonly used phrase, but it could refer to a sequence or set of events that are difficult to understand or explain. Full definition
The game has a very fitting ending not just for this games» storyline but for the entire Mysterious series. (miketendo64.com)
That fanbase, and Kuroko's author Tadatoshi Fujimaki, spent over a year under threat by a mysterious series of packages and letters targeting Fujimaki, his former high school and university, and Kuroko's Basketball - related events. (otakuusamagazine.com)
This latest entry to GUST's popular Atelier franchise concludes the Mysterious series with an all - new heart - warming narrative. (gonintendo.com)