Mashiro-iro Symphony/Heartwarming

"Everyone: (to Airi) Happy Birthday!
 * To be fair, it's Every. Single. Episode. What? Someone had to start the entry someday!
 * Episode 4 has one of the best examples so far:

Airi: But... Why would I get a celebration like this... There was nothing like this when I lived with mother...

Shingo: Sena-san, we feel like celebrating your birthday. Are we not allowed to?

Airi: No, it's not that."

"Airi:"
 * Episode 10:.
 * Episode 11: