SMTDSO is a 3DS retail game, just so you know. It's not eShop exclusive.
My plan with this game is to beat it just to get it over with, delete it, download CoP again, and download this on my 16 GB SD card to eventually in 20 years when I have the time see the other endings.
Which means probably never because I honestly really don't like the gameplay in this game. Or much of anything. It's not terrible, I mean, it's good enough I'm still playing it, but I think the story is literally the only thing keeping me going.