my favorite original would be secret sweet night. Though if its non original we're talking about it would definitely be ao sumire more than anything.
you mean "sweet secret night," by Mira right?
Ugh, I hate these types of questions because there "usually" is never just one. for example, I absolutely love "To Meet," by Nishi Uko, but I am equally invested in "Caterpillar and Butterfly," by Ken Kurogame, and I adore "The One I Love," by Minami Katase as much as "To Meet."
so you see, i have 3 that are easily my 1-2-3 choices. however, I could not tell you which ones would be 1 or 2 or 3!