http://www.nicovideo.jp/watch/sm23705772
https://www.facebook.com/naotoacedecectiveshirogane/videos/801179313312359/
And Catherine, apparently.
I think Catherine takes place in the same universe as Persona, since Vincent is seen drinking his problems in P3P.
Catherine is a Persona spin-off? which is already a spin-off of SMT?
It's like Yoshi all over again.