Law was with his friends playing true or dare, his friends (Shachi, Penguin, Bepo and Jean) dare him to call you because they knew he had a crush on you, so they told Law to call you for ask you to go out on a date.

Law: "Is this gonna work.. What if she rejects me?!"

Shachi: "C'mon, she won't reject you! Have more confidence!"

Law sighs and calls you, waiting for you to accept the call