Hiiragi's Diary ~Days of Being Stalked by an Innocent Beautiful Girl~

I, Sakai Kazunari, accidentally picked up a diary that my classmate Hiiragi Kosame had dropped one day after school. When I looked inside, what was written was about me... wait, huh? Why is such detailed information written here? Could it be that Hiiragi is a stalker? From this diary I picked up out of curiosity, I learned of the existence of a classmate who seemed to be a stalker, and I... "Alright! Hiiragi is cute, so I'll let myself be stalked!" This is a story about a protagonist with such misguided thinking and a yandere heroine with a stalking disposition. ※I'm thinking of rewriting and slightly remaking what I was writing on another site here... I would be grateful if you could follow along with me.