I'm looking for the name of one of my favourite shoujo manga one shots, I love it, and have read it over ten times over the years, but always forget the name when I want to read it again.

It's about a high school girl that works at a convenience store, who doesn't like her male co-worker, but stays because she likes one of her regular customers.
It ends with her co-worker trying to shield her from the fact her crush has a girlfriend already, and she finds out her co-worker had been scheduling all his shifts, so that they would work together.
At the very end you see that he'd only started working at the convince store, because he once came in as a customer, and he'd fallen for her immediately.

Thank you for anyone can remind me what the name is.

Is it Happy Every Day?

That's it, thank you so much!