An "Undertale" AU inspired by the "One-Punch Man" mangá series, the idea is to be a tribute to Undertale and some other franchises and games. The story follows "Den", a teenager who shares a powerful power with his sister, as the story progresses, difficulties and antagonists emerge with cruel and even insane desires. Not everything will be the same as the original story of "Undertale", some things will be modified to fit with the story context. As the universe is not meant to be like a game, things like "LV" or "EXP" will not be used. Also, as this description says, this "webcomic" is inspired by the "One-Punch Man" mangá series, there will be a lot of scenes making references to it and some similar scenes too.