Well I had an idea for a story, and I knew I wouldn't be able to articulate it as awesome as you could. I send you more details in a private message. BTW I never understood what this meant:~ Doesn't it mean like, cute sigh or something?
I can see how Sad Happiness is an oxymoron that might relate to the message throughout your story (i.e. the happiness of remembering good times, but the sadness in the reasoning behind initially recalling said times) but I'd have to know more about the story before I could really approve of a title like that >w>