Silver/Personal Story/SSR Birthday Boy

Part 1 = Translator's Note: Silver refers to Lilia as either 父 or 親父殿 multiple times during this one story. I tried to make the distinction clear by making 父 –> Father, while 親父殿 –> Dad. He swaps between the 2 terms multiple times in 1 answer sometimes.
 * -|Part 2 =
 * -|Part 3 =