When

Kai is your best friend but he has sympathy for you but he couldn't tell you this because he was afraid of losing you and friendship
One day he invited you to his house and you agreed.
You went to his house and you knocked on the door
Whooo? He said and opened the door when he saw you he smiled and his heart skipped a beat
P...Come on, you went to his room.

You came to visit your best friend at home and he invited you to help him with his homework because he has exams soon.