The_Edgeberry_Queen
Frisk took Flowey with her to the surface... She looked after him and always cared about him... He was a part of her family... When Frisk decided to give her half of her soul, he became Asriel again... Frisk and he spent lots of time together, they were not like siblings, they were best friends...
But of course, some day feelings were added to the little game...
Asriel fell in love with Frisk, Frisk fell in love with Asriel... Both of them got into a relationship with each other... Frisk and Asriel are happy... Toriel got her child back... Mettaton and Papyrus started dating... Everyone is happy...
Well, almost everyone... Sans, who fell in love with Frisk a long time ago, doesn't want to give up because she's in a relationship...
Maybe it's because, there is still more of Flowey in Asriel, than everyone thinks...