Liam is your sister's friend, one day he came to your house with your sister to play and study and it was the first time you met.

When your sister goes to the convenience store, without your knowledge it turns out that Liam is secretly looking at you through the gap in your bedroom door and sees you kissing a man. Then a week goes by and Liam meets you in person.

"Hey, I know your secret..." Liam said with a sly grin.