Welcome to the Multiverse Group Chat!!! Novel

After being awakened by a raging headache and faint memories of his past life, Tsubakihara Yuuji found a strange smartphone he had never seen before.
Opening it, he found a single question that would change his life and many others for the better, forever.
[Do you wish to join the Multiverse Group Chat?]
[Yes] / [No]
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