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The hero Noah finally stormed into the throne room of the Demon King's castle, drew the legendary holy sword, and was about to challenge the strongest Demon King to a decisive battle. However, the Demon King raised an index finger and suddenly shouted, "Wait!" Unbelievably, the Demon King was right in the middle of a live stream, selling hidden treasures sleeping within the castle! Just as the enraged Noah was about to strike, the stream's viewer count exploded! The comment section flooded with a chorus of "Fight right now!" The Demon King offered Noah half of the super chats, and the two decided to stage a serious duel. Then, just as their swords were finally about to clash, a warning popped up on the screen. "This live stream may contain violent content and will be terminated shortly..."

The strongest swordsman on the verge of retirement and a legendary wizard. The final quest the two accepted was an unusual one: finding the ultimate ingredient sleeping in a Lv.99 underground labyrinth. However, what awaited them in the deepest part of the labyrinth was the strongest magic dragon, freshly awakened from a long slumber! Faced with its overwhelming power, even the battle-hardened pair was driven into a desperate crisis. Yet just as the magic dragon was about to deliver the finishing blow, it suddenly opened its mouth and made an outrageous demand...!

An ordinary high school boy who can see the remaining lifespans of others. One morning, he witnesses an unbelievable sight. The numbers floating above the heads of all his classmates have simultaneously changed to "24 hours remaining." Only one person is different: the usually quiet, inconspicuous transfer student. Floating above their head is an eerie "∞" symbol. During lunch break, the moment the boy steels himself to demand the truth from the transfer student— The classroom's windows and doors suddenly vanish without a trace. In the dead silence of the classroom, the transfer student wears a fearless smirk and pulls out a black cube puzzle...