Any scene between Junpei and Kaede, really. They really are just adorable together. Akari when she finally starts to make friends is a very heartwarming scene.
In episode 11, we get to see the significance of the little cat doll that caused strife between Kanako and Junpei in an earlier episode. It turns out that as kids, Junpei was upset that he couldn't hold Nyamsus due to his allergies to cats. So Kanako made a doll version of Nyamsus so that he could "hold" her without the allergic reaction. She remembered this as she saw Junpei crying at the movie where a little girl found an abandoned kitty. So it meant a lot to Kanako that he truly didn't just throw the doll away carelessly.