If possible why don't you send a message to the scanalation team who used it for details ? I bet they will at least have a forum or a e-mail so that u can get in touch with them
Looks like Donuts Tsuushin. I've never read it, but the art looks like a match (based on the cover, at least). Thing is, Donuts Tsuushin is Shounen Ai, while the picture looks more shoujo-ish. You could sift through some of TAKAHASHI Mako's stuff, I guess...
It looks so familiar, but I can't remember. At first I thought it might've been from Koukou Debut's mangaka, but I don't think it is anymore. But tell me if you ever figure it out! xD
________________ ♪MONSTARR~ will eat all your cookies and steal your bishies~♪ Φ_Φ