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Puberty syndrome is an urban legend. Patients may suffer from paranormal phenomena such as "hearing other people's voices", "seeing someone's future" or "someone's personality swapping with someone else". Now he and they are trapped in such symptoms. (There is indeed something wrong with My Youth Love Story + How to develop a passerby heroine + I can't learn it, etc.)

Get a copy-making system to travel to various worlds. "Single player challenge copy." "Personal training copy." "Large War Replica." ... "Would you like to make it?"