Unfeigned Happy Ending(偽りのないhappyend)

The story revolves around Eimi, who moved to Tokyo after graduating from high school. She invites her sister Yu to move to Tokyo, but soon after she goes missing. One day, Eimi meets Hiyori, whose sister has also disappeared. Everything changes when the police contact her to inform her that they have found the body of a young woman in Lake Biwa. However, it is that of Hiyori's sister. Eimi and Hiyori meet again and together they search for the murderer, but it takes an unexpected turn...