Taken from Baka-updates:
A girl gets impatient when she and her boyfriend haven't kissed yet, even though they've been dating for awhile, so she tries to take matters into her own hands.

Also, there's a oneshot after this about a girl with a similar problem as in the first story with her dating the most popular guy at school who hasn't made any moves on her.

The stage is set in the prestigious Private Jyoushioka High School—or more commonly known as Joshi High. It became co-educational a few years ago, but females still heavily outnumber the males. The number of males could be easily counted. While one would think males would be pampered in such a harem school, the reality is far from being heavenly. It was the world of female domination. (Source: MU)

A girl and her boyfriend of one month plan to go on an overnight trip to a spring, and she expects that "it" will happen but...

More beautiful than any girl Souta-kun. His 'cleverness' puts everyone into a state of a daze, but his true face is...!?