HELP need to find this manga

ᘛ⁐ᕐᐷgoofy gooberꈨ  October 16, 2023 12:14 pm

so basically guy wakes up? the demon king which was sealed by his father aka the hero and demon king trained him cause everyone neglected him since he wasnt like his father and he wanted to become stronger so he did the demon training and they had a tournemet arch? so they decide the new heros? cant remember much but he used a move which triggered some old poeples memories of the demon king and yeah thats all i can remember pls give link if u know what manga it is also i know that it had a novel and the manga was a promo of some stort

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