Part 1 & 2... Love story that I'm sure you wouldn't want to miss. :)
sorry, If it's opposite, it should be...
if you like : Bokura ga Ita Zenpen
then you might like : Bokura ga Ita Kouhen
I find it hard to fix it, sorry! >.
Though the endings are different, both female leads deal with the feelings of inadequacies compared to a past girlfriend, or those around them.
Both are share are based on a manga, as well as deal dealing in School, and are a romance.