those first two covers. the first one because of its simplicity and everyone looks beautiful. the second one because the text compliments that composition best.
i would like the bottom two a lot more if the title was placed to mind the effect of the rest of the picture.. take cues from the Hatsukoi Cider covers or something.
i don't really get what they did that makes the text look a little blurry, hopefully it looks better in HQ.
The first one is my favorite! I actually like the writing. Too bad the covers are very typical and don't really stand out as amazing to me. The girls are beautiful though... as expected