This is one of my all time favorite manga. It's comedy through and through and believe me, it will make you die from laughter.
It is a shoujo manga about Mafuyu Kurosaki who is a high school student who used to be a delinquent and the leader of a gang and was expelled and sent to another school. She tries to become a 'normal highschool girl' and hides her past reputation. However, that doesn't exactly work out with a big mystery bet she needs to help someone win.
The development in the last few chapters, especially the newest one, really pisses me off. A deep sense of "stereotypical shoujo" is leaking in to a series that has otherwise managed to break past the laws of shoujo. I hope this doesn't become an entire arc around Hayakasa.