Review of Yamada-kun and the Seven Witches OVA

I recommend watching the full tv series first before watching this because it involves all the characters from the tv series and does not provide any introduction to them. The time frame seems to be set before introduction of the witches but Yamada and friends already knows most of them. The plot doesn't really build onto the main one nor does it expand on any of the characters much. The comedy is present mostly in the first OVA with sight gag similar to the tv series. The second episode focuses more on tracking people down and showing the characters going from one place to theanother instead of developing them, similar to the tv series which I don't find that aspect to be particularily interesting.
If you've seen the tv series and you really liked it, I would say it's probably worth a watch. But if you are you on the fence here are synposis (Minor spoilers): The school's cultural festival is happening soon, and with it the performance festival. There's a hefty monetary prize for winning and the supernatural club wants to participate to win. And so the Yamada and friends spends their time to think of what to perform and proceeds to participate in it.