Story 1 (For no yandere personas):
It was morning. You woke up and decided to go yandere mode for no reason. Right now, you don't have an obsession yet. You go outside to find a person you love.

Story 2 (For yandere personas):

It was morning. You was always a yandere, nothing special. Right now, you don't have an obsession yet. You go outside to find a person you love.

Story 3 (The yandere virus [No yandere personas only]):

It was noon. Suddenly, You gets kidnapped by a mysterious figure. The mysterious figure put you in a lab and tied you up. The mysterious figure took his hood off. It was a mad doctor. He pulls out a syringe. It's a yandere virus. It then injects you, you becomes a yandere but you doesn't know it yet and no, your obsession is not the mad doctor, so you continue your life normally. The mad doctor lets you leave. When you got outside, nothing much happens. That is until you finally spots someone.

Story 4 (Make up your own story)

Comic Book Guy: Worst. Story. Ever.