What's The Name of This One-Shot Manga?

I read a manga recently, and I thought that a character looked familiar. I had planned to go back and look at it one more time... but I forgot the name.

It's about this girl who totally failed at mathematics in school. For some reason, she had to get her math grades up, so she asked the smartest kid in class to tutor her. He was this creepy-looking guy with his hair all in his face and stuff who didn't talk much. Turns out he was a pretty nice guy, but she made a comment about his shaggy hair obscuring his vision, and the next day he cut it. Not only was he a nice guy, apparently, but pretty cute too. All the girls in the class totally started going after him, and the girl who he was tutoring felt left out and kinda sad. In the end, though, everything turns out happily because he asks her to hang out with him and stuff. Or something like that.

If you've read it, you should know what I'm talking about. It's a one-shot. I can't remember any of the characters' names or anything. Can someone help me? Thank you~!