We Were There Vol 4

From the VIZ Media edition

Nanami Takahashi falls for Motoharu Yano, the most popular, carefree boy in class. For Nanami, it's first love, but Yano is still grieving the death of his girlfriend who died the year before. It's not regret. I just feel that... Maybe I messed up a bit... That's all.

Source: Anime News Network Encyclopedia