As of now, there is no official information confirming that "Duet Night Abyss Second Beta" is a real or publicly announced event, game, or platform. It's possible that this name could be a fictional concept, a fan-made project, or a misunderstanding of an existing game or beta test. If you're referring to a specific game, app, or event—such as a beta for a mobile game, an anime-inspired experience, or a VR/AR project—please provide more context (e.g., developer name, platform, related media) so I can help clarify. For example: Is this related to Duet, the 2015 puzzle-platformer game by Joint Attack? Is it connected to Nightmare Before Christmas, Abyss, or another franchise? Could it be a beta for a new mobile game, anime, or social experience? Let me know so I can assist accurately!