What on Earth is Cruise Sign? Another Konosora spinoff?
I can't name a VN for 3DS that's not either Zero Escape or Harvest December. There are lots of similar games, such as Rune Factory, Harvest Moon, Story of Seasons (not VNs at all but with lots of text, interactions, and even romance), and the new Layton game that's pretty appealing... but that's hardly a VN.
Vita is good if only for the Utawarerumonos, and there are huge piles of VNs and animesque JRPG there. In fact it probably is the only sort of thing that comes out for Vita now anyway, since Sony called it quits early with the console.
Both are good options because they're pretty inexpensive and have pretty good libraries for us Jap lovers.