I woke up as Ichirou Watabe, a side Character.

I woke up in an unfamiliar room and realized I become Watabe Ichirou, a side character from the anime/manga Horimiya. I was known as a stalker who's interested to Miyamura. I know the story but why is everyone acting strange? I'm ashamed of Watabe's Stalking behaviour that's why I wanted to change and leave them alone...