It was a shoujo manga, and it centered around this girl. Her grandma owned this old shop and the girl wanted to completely redesign the shop and sell clothing. So the girl manages to convince some classmates to help her. I remember that there was this one guy who was good at sewing I think, and at first he didn't want to help her shop but in the end she convinces him. She also had another guy and one more girl help with the shop. That's about all I remember because I read this series a while ago. Anyone know what its called?

I'm pretty sure the manga you're looking for is
Kabushikigaisha Love-Cotton

♪MONSTARR~ will eat all your cookies and steal your bishies~♪ Φ_Φ

Yup, that's it, thanks a lot!!!