Hear Me Out, Calli

Meet Ai Yashi Achiko, A day dreamer and a night thinker. A childhood bestfriend of Calcifer Sachihiro. An introvert but a campus heartthrob in their University called Twilight. Calcifer has a disease called 'Traumatic disorder' which him lead to suicidal thoughts. He also has unknown disease where when he fall asleep, sometime he will having a dream where he wanted to end his life. And if ever he ended his life through his slumber? He will never wake up again.

Will someone save him?
Will someone can cure him?
Wll someone out there who will stay beside him and who will always be there to wake him up through his nightmare?

Will it be his childhood bestfriend? or
It will be someone?