Dengeki PlayStation Vol.69: first reveal of the game (special report)
Announcement article presenting lain as the new title from the staff behind NOeL (Pioneer LDC), describing a player accessing a fictional network with the navigator Lain and the 14 year old schoolgirl Lain Iwakura; few other details were known. The cover and a reader survey also list the item. Identified via archive.org OCR; printed page number not confirmed.
Sources: archive.org