The protagonist, Narumi Takayuki met Haruka by Mitsuki setting them up with a date during High School. Later, after Haruka gets in the accident, he felt responsible for it and falls into a deep depression. Later in the story, he works at a family restaurant after having regressed in his studies due to the accident. In Haruka's absence, he gradually begins to develop a relationship with Mitsuki. (Source: Wikipedia)