Natsu no Iro no Nostalgia Natsu no Iro no Nostalgia is an Adventure game, developed and published by Moonstone, which was released in Japan in 2015. Natsu no Iro no Nostalgia
The story begins as Haruhiko's younger sister, Fukamine Riko, returns home after several years away. Beginning with her appearance, Haruhiko's life starts to change very quickly and feelings of the past begin to surface once more.
This romance visual novel explores the question of gender integration at a private school. A curious series of events leads to our hero becoming the only boy at a prestigious girls’ academy… But over 99% of the girls are against integration!