What a great manga, so relaxed and calming, but still so sweet and entertaining. I really did love how they all had moments of "rivalry" (so to speak), but in the end, they were all genuinely excited and happy for each other's promotions, even when a kouhai skipped ranks, which naturally would lead to some frustration. I really do wish we found out exactly who Akari was always writing to, it would've been interesting. If you like relaxing and sweet slice of life manga, you'll definitely like this.