Cute visual novel. I went and did three endings. (he thinks you're weird, kiss, main ending 2)
It's definitely not perfect, though.
Art wise, I think you could improve the game by adjusting how the dialogue text looks. You should try to avoid comic sans for a font and the borders have a lot of stray pixels. The menu looks like it was just a bunch of jumbled MS fonts, you could try using pictures from actual magazines to make it look better. The flash itself should be longer in height and a bit less wide, so instead of just headshots for characters, you could draw half bodies instead. I'd like to see more graphics overall from the game, like for special scenes and endings. This means drawing a full picture for more important parts, (SPOILER) such as Mei charging at Jiro or Jiro slapping his classmate.
Gameplay wise, it's a visual novel, so it's obviously not going to need much gameplay. Adding a "skip dialogue" button that takes you straight to the choice would make the clicking less tedious, especially if you're trying to see all endings and don't want to see the same scene over and over again.
I like the sticker bonuses but I think if you hover over them with your mouse, it should say what ending you got the sticker from.
Overall, I really like this game, just think it needs a bit of improvement.