Clover (OTSU Hiyori)

From Lililicious:

A series of one-shots about four sisters, each focusing on a different sister.

The first is about a good girl who is tempted to break the rules.

In the second, two girls begin a pretend relationship with each other. But when one of them actually falls in love, will her heart be broken?

The third story is about a student council president who's always late for meetings.

In the forth story, a girl has been in love with a "witch" for as long as she can remember.

In the extra chapter, Midori (from chapter 2) worries that her girlfriend has fallen out of love with her.