Bokura ga Ita - We Were There

Entering high school with lofty aspirations of forging many friendships, Nanami becomes smitten with the mysterious Yano. However, his extensive cache of enigmas may prove too overwhelming for her to unravel. Back then, I failed to completely comprehend Yano's intentions. Note: In 2005, the work was bestowed with the Shogakukan Manga Award for the shoujo category.