Technically the images are in OGP's client, they're in the CVOICE.SPF file, but untranslated. STORY1 is the Muwen & Zoe story, STORY2 is the Levi one. STORY3 is some weird thing with that funky Gem guy, and then the Christmas event story in Korean left in at the end. (I think that's a mistake.) STORY4 is the Christmas event story. STORY5 is La Season Festival. STORY6 is a Soul Breaker intro. You can see them all here
. STORY4 & 5 are from earlier clients because they were translated in the past, but aren't now. I didn't want to replace them.
Most likely they're all for events that were done in Korean La Tale that never made it to OGP's version.