Akasegawa Naoya's mother remarried recently and he suddenly finds himself trying to get along with his new big sister Amane, a student of the prestigious Kasugano Girls' School. But his new big sister isn't like what you might first expect.
- Author and artist
- Ume Aoki
- Publisher
- Hakusensha
- Alternative names
- Binetsu Kuukan
- Binetsu Kūkan
- 微熱空間
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