Finally, the menu theme in high quality is available on Soundcloud!
If you want use ToukenKamui song please: 
Ask and credit ToukenKamui\刀剣神居Undertale AU! 
Don’t steal his song,PLS!

《Credit》

~AU~

Undertale by Toby Fox
Murder time trio by ToukenKamui
Dusttale by Ask-Dusttale
Killer!sans by Rahafwabas
Horrortale by Sour-Apple Studios


~Ieitmotifs~

"Once Upon a Time", "MEGALOVANIA", "Core"  by Toby Fox

~Sprites~

Murder time trio sprite by IsRei
DeviantArt Link:
https://www.deviantart.com/isrei/art/Murder-Time-Trio-v2-815362992
edit based on 刀剣神居Undertale AU edits.

[MURDER TIME TRIO] OST - 001: "MAIN MENU" (Menu Theme)

“I do not like what I have to create, but I have to make sure that I continue for the eternalness to arise. If I fail, then I get back up. If it means to make myself damaged into an state beyond Broken, then so be it, I shall go on until my final-words.”

“The darkness and the Lightness are equally balanced when crossed to each other, similarly same said for how I do my work, but the truthfulness behind such sayings….is that my work is completely different, Complex, impossibly intense, and interestingly-What isn’t there to what is now.” 

“Violence and peace are both not the answers to the night, instead the night’s only answer is the primordial-Cosmos.” 

“History may repeat, Math may repeat, and Memes may repeat. But in the deck of godly cards, Words Themself are the only concepts that repeat across pure actuality.” 

“Missing info is sometimes better than having the actual info, but then again, The past of knowledges have said otherwise.”

“If all is met with death as the grand-finale, then why can’t erasure be the same? So thus, these words can be matched with the authority I have these days, yet my authority isn’t exactly righteously correct, sometimes it is wrong, and otherwise it is unfairly incomprehensible to Ascending.” 

“Realism and Fiction are merely nothing to me, since I transcend past such, but at what cost…? Because all has burnt away into the erased, unable to be written more, but left to rot like trash.”

“I do not enjoy mere existence, but I deal with it so I can finish what I have started long ago. Otherwise, these timeless-Conceptions are breaking away at every corner of truth.”

Finally, the real SOUNDCLOUD page dedicated to the full soundtrack to the MURDER TIME TRIO project is here.
If you use ToukenKamui song please credit ToukenKamui\刀剣神居Undertale AU! 
Don’t steal his song,PLS!
Murder time trio / Music by 刀剣神居Undertale AU (ToukenKamui)

《Credit》

Undertale by Toby Fox

~刀剣神居Undertale AU~
Original video: https://www.youtube.com/watch?v=_DgCNK1Sv7E&t=32s

~Sprites~
Sans sprite by IsRei
DeviantArt Link:
https://www.deviantart.com/isrei/art/sans-v6-815241236

~AU~

Murder time trio by ToukenKamui
Dusttale by Ask-Dusttale
Killer!sans by Rahafwabas
Horrortale by Sour-Apple Studios
Insanity sans by Hdlegend Killer-DJ
Satsujin!sans (Murder time trio) by 刀剣神居Undertale AU

[MURDER TIME TRIO] OST - 001: "MAIN MENU" (Menu Theme)

MURDER TIME TRIO FULL OST