These scans are from the Boogiepop and Others artbook by Kouji Ogata. The scans are by John of AnimeProjects.com, but his sites have gone down since last year and attempts to contact him have failed. :(
Feel free to use these scans for graphic making use, but please do not add them to another collection! Thanks :)
"Longing for your memories and being captivated by the past are different matters.