 If you liked Piano no Mori |  ...then you might like Uchuu Kyoudai |
Piano no Mori and Uchuu Kyoudai are inspirational stories about a main character who follows a dream and tries to make into a reality. Both series has a lot of characterization and a very focusing writing on their development. There is also a lot of relationship dynamics that can be relatable and realistic. Throughout this experience, we can see how much certain characters change and learn from their mistakes. There is also a great amount of focus on background stories with clever transitions and events that influences characters' goals. In general, recommended for anyone interested in a story of inspiration.