Mirai Nikki
Oops, forgot to put in vol 6, which was the only volume I could find in a 2nd-hand bookstore (and it wasn't even Book Off).
Totally blaming milk_of_lime for this. ;_; I'M SO BROKE NOW. I need to start making bentous for my lunches for awhile.
ALL HAIL YANDERE
To Adi: I can't find Flight-Plan games at all in 2nd-hand stores now, WTF. D: I forgot about your other titles so I'll go check the stores again next time I have time.