Betrayed love..

Undertale Au: Flowerfell
Route: Genocide!

Sans meets Frisk, and as time progresses he falls for her. Chara (I'm making them evil, sorry ^^") doesn't care about the matter and makes Frisk kill everyone in their path. Even with the deaths, Sans continues to plead that Frisk is innocent and he'll prove his sweetheart is as pure hearted as he says. When they get to the judgement hall, he admits his feelings towards Frisk. Chara uses this to their advantage and.. find out while reading ^^"