The term "Missa" could refer to Mass in a Christian context, but when combined with "X," maybe it's a play on words. The dates "21.02.12" might be a date, but written as 21st February, 2012, or maybe it's formatted differently. Then there are names: Aila, Donovan, Kit Mercer, and Slide. The title ends with "P..." which could stand for something like Part, Project, or maybe Porno?