Asahi no Kyoukai

A high school girl, Yuzu, saves a beautiful young man, Asahi, who was about to commit suicide by jumping into a station platform.
Yuzu, unable to leave him alone after saving him, gives him her contact information, but later discovers that Asahi is actually a girl.
Yuzu is attracted by Asahi's somber attitude and beautiful appearance, even though she knows that she is the same gender as Asahi. "I want to know more about Asahi. I wonder if I can get closer to her...?"

(Source: Light Reason, translated)