I obviously had to ask what this was about. So, apparently, these are simple messages for whoever is going to receive them. For example, Ganbacky is "gambatte" (something like, "do your best!"), Yorocky is "yoroshiku onegaishimasu" (there's no direct translation for this phrase but it's something like "please be nice to me"), Tomocky is for "tomodachi" ("friend"), and Sukky is for "suki"(could be "like" or "love" although I'm not sure why there's also a Lovecky box). Oh, there's also a Thanky, but that one's pretty self-explanatory.
More interesting though is is how Valentine's Day is celebrated on this side of the world.
