Initially 3-gatsu no lion's first season seems to be about shogi. However, 3-gatsu is a pure slice of life anime, where the main character happens to be a shogi player.
It is a very versatile anime that covers a broad range of topics. As such it offers the viewer a warm fuzzy feeling, sadness, frustration or a mix. But it generally gives off a good vibe.
The topics are well crafted, detailed and include interesting views. The topics are well interwoven with the main story line and even tough some topics can be heavy it does not refrain from highlighting positive events.
In conclusion, 3-gatsu no lion season 2 is a master piece exceeding even the first season.