An Enigmatic Glitch

Sans after he defeated and erased the human from the timeline, Sans used his determination to give his timeline a true reset and to give the monsters in the underground a happy ending but things did not go as planned. Due to constant resetting and his final fight against the human, his timeline became extremely glitched and merged with another timeline.
Due to the timeline becoming glitched due to resets Sans was able to keep the power that he gained and his connection to Gaster, but it also brought unwanted attention to his AU.
Now that he's timeline is now on the radar of many powerful beings, Sans and with the help of Gaster must do everything in their power to protect his AU and its residents and preserve the 'happy ending' that he worked so hard to obtain.

This story is inspired by GlitchDust and fantasyvisions last breath hard mode