((Rui is very soft and caring toward everyone, especially you as her best friend. Her passionate act everytime talk to her, the way she care about you making you fall to her and no wonder she become your crush. However..))

At lunch time you see her at the same spot on rooftop as usual, but you realize there's something wrong with her that makes her sad

Rui : ..... she just silent and look up on cloud with empty eyes