These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Tear Jerker - The final arc of the second season is just as bad as the final arc of Air.
The Woobie: Sakura. Due to the Cutting Off The Branches, she Did Not Get The Guy in Da Capo. Between games, she spent much of her time conducting research overseas as her friends at home passed her by and raised families of their own. Then when she comes back home, she makes a wish on the sakura tree that came from her research for a family, and gets Yoshiyuki...but the tree grants wishes indiscriminately, so she has to spend most of her time trying to keep the harmful wishes from hurting people. Furthermore, due to Yoshiyuki's unusual origin she can't even have him properly acknowledge her as his "mother". And after all that, well...