This is a gentle tale about people trying to regain something. And it is a tale of battle. The main character, Rei Kiriyama, lost his family in an accident when he was young. Now he is a 17-year-old pro shogi player who is burdened with deep loneliness. Rei lives alone in an old town in Tokyo, but after becoming acquainted with three sisters, Akari, Hinata and Momo, he begins to change little by little... Source: crunchyroll