Maybe a Hero!? (A Doraemon Fanfiction)

In a parallel universe of Doraemon, Nobita who lost his everything to the demons and magical beasts which started running rampant and killing many people. Even then he managed survive for 16 whole years, which only gave him more misery and as he watched his loved ones die and died while fighting the same breed he finds himself 16 years back, 12 years old.So...will he be able to protect his loved ones this time around. Come and follow him in his journey to the top.