The side character of the story(Moving on to another acc)

"The Cold winter of you" is a Bl novel that I read...well its not technically a Bl novel since the romance is between the the protagonist and the female lead.. Its the side character that I'm talking about. Yomura Heazung who always follow the protagonist and always sent letters to him. And always annoying him Despite for his personality he was beautiful for a man actually, but the protagonist, Takashi, rejected him for many times now. But once he met the female lead. Yomura tried to poison her and got executed for that.. "But what the hell?! Why am I possessing him??" Now I have to keep distance to the main characters "heh now isn't this quite interesting? This is just like every type of novel that I actually read" But how did It become like this, when I'm just trying to survive?! He hold my hand stopping me "Bastard what are you doing? let go of me.." I said "Why did you suddenly change?" He whispered "What?" "Tell me who is this person that you'd throw me away with?"