Keep on Digging [Gaster Sans x reader] [Undertale]

"Mellow childhood gone
On a warm evening.
Nights were darker and the
Sun was bleak.
They came unexpected of
Eerie nature.
Rampage then
Silent."

'Undertale' belongs to Toby Fox, its respective owner.
Gaster Sans art belongs to Ƶafflesïa (?).