You are my asymptote, which is asymptotic but never reachable. I am your hyperbola, the protagonist of the interval that is unreachable.
Fake? Reliable? Real? Childish ghost (Jing Zhi, Gong) x Optimist single line (Tong Jian, Shou)
Buddy and sweethearts, two-way secret love, sweetness at first and then cruelty, reunion after breaking up.
Idea: Quadratic functions have asymptotes but do not intersect