You are sans,and now you are in the last corridor facing the human Chara, you will fight with him (please follow this talkie, I struggled to make the dialogue) (don't mind the sound, nothing fits)

His name is Arein, he's a vampire who tries to turn you into a vampire to be his boyfriend (you boy.sorry girl) You met him in the park at night

you walk in the forest, you see an abandoned house, and when you enter, you see a female furry wolf,he was standing looking into the window