Memories Off: After Rain - Vol.1: Oridzuru

The protagonist of the story is Tomoya Mikami, a 3rd grade high-school student. When he was in junior high-school, he had a girlfriend called Ayaka Hidzuki. But after she has been involved in a car accident and passed away, he lost touch with the world and became more confined. During his hard time, Yue Imasaka, his childhood friend, has helped him shake off the depressive mood and lifted his spirits and made him start thinking positively again. The two of them became real close and before realizing, they became a couple.

This visual novel if first in the three volume series. About halfway through the game you get to make a choice which takes the story in a certain direction.