The relationship between Christina and Luke changed one day, when Luke suddenly had a change of attitude towards Christina.
He avoided Christina like a plague and kept himself away from her sight.
At first, Christina brushed it away, thinking that Luke was stressed because of the situation at his home. His mother, who used to be an elegant, composed lady, had gradually gotten sick because of grieving for his late father.
His mother could no longer work to support the both of them, and Luke had to take the burden of proving for both of them. Thus, Luke took a part-time job after school to support him and his mother's daily expenses and also money to take his mother to the doctor's, to be treated.