Notes:

Translation:
D: "Eh… Cynthia…sa…"

C: "I'm home."

D: "But you said… You wouldn't be back…for a year…"

C: "I said that, but it became the season I yearn for Hikari. So I came back."
"Even in Spring and Summer it was cold…"
"So, next year, I'm going to be with you."

Part 1
Part 2
Part 3