Love, life, tragedy and betrayal

Meet four high school friends: Haruka, Takayuki, Mitsuki, and Shinji. Life's promise shines brightly on them until an accident leaves Haruka in a coma. Her boyfriend, Takayuki, can't forgive himself, and seems determined to follow Haruka into a comatose state. Mitsuki dedicates her life to taking care of the tragic young man, and the pair fall into a relationship floundering in guilt....