Looking for the Oneshot Shoujo Manga about a guy with split personality I read a manga a while ago about a girl who fell in love with a guy whose other darker personality appears at night. Later on, the girl and the dark side fell in love with each other and the dark side got jealous that the girl likes the other side of him more.

Can anyone identify what this manga is?
Out of the five I've found, this one fits the closest:

Blackberry


  Ever since Fune Momohara was told that she was just like a "guy
  friend" by the boy she liked, she's been bent on becoming the ideal
  girl. But when she meets the perfect guy who turns out to be more than
  a little pretentious, she realizes that it can be difficult to keep up
  appearances!