Tsuki ga Kirei has to be one of my favourite middle school romance anime, with Your Lie in April being an exception.
The story is very relatable and Kotarou and Ayane are some very realistic characters. Something about Tsuki ga Kirei that stands out to me is how the anime tends to drift away from useless melodrama just for the sake of doing it. Having your first love in middle school is a steep journey uphill and this anime totally nails it.
Complete with great art and soundtrack, Tsuki ga Kirei is an underrated gem that deserves more recognition than it gets.