Natsu no Iro no Nostalgia is a visual novel developed by Moonstone for the PC. The game was released in Japan on January 30, 2015.
The story follows Orikuchi Ryouto as he returns to his old hometown. Here in his hometown his home caught fire, during the fire he witnessed his parent burning up. In a panic, he and his twin sister Orikuchi Miu managed to escape by jumping out of a two story window. He ended up in a coma for several days as a result of the impact. When Ryouto woke up he realized he can now see emotions as colors, oxny is the color of fear and unplesentness, red is the color of anger, magenta is the color of life and so on. He returns and is reunited with his old friends Manazuru Misaki, Maniwa Shouko, and Shinjouji Ayane whom he has not seen in 3 years. They all attend Himawari Garden a school that upon arriving to, Ryouto learns is a all girls school. But due to Maniwa Shouko and Shinjouji Ayane's notoriety in the school, they convince the school head to allow him to attend the school. This is the story of friends reunited and what turning points have occurred in their lives since their separation.
The game received a original soundtrack release which released alongside the game. It features music from collaboration group solfa and performances by Japanese singer Chata, Meu Koharu and Haruka Shimotsuki.