It’s the first thing a female college student in her 20s used when she lived alone

(1)What kind of key is this
(2)That’s the key to my house key
(3)Lockdown of memories
(4)I thought it was the door lock that was shocked when I moved here
(5)They gave me the key
(6)It’s my first time using a key
(7)I’m sorry, but how old are you
(8)I’m 21 years old
(9)21 years old
(10)33 years old
(11)We’re 12 years apart
(12)If he was 21, he’d only live in a house with a door lock
(13)Latte is
(14)I used to leave it to the next door or the security office
(15)He’s amazed by the keys to the front door of the apartment because he only uses the door lock