Since Then

Cessa and Khloe, Keifer's sister are childhood bestfriends. They are neighbors. But suddenly, Cessa and her family transferred to another place. But, nothing changed, they are still bestfriends. Cessa is always at Khloe's house, causing Keifer to see him almost everyday. While Keifer on the otherhand, isn't sure about his feelings. What is Cessa for him? How does he look at her since then?