Forever in Regret

On the eve of the wedding, my younger sister Ellie ended up in my fiancé's bed because she was drunk. Afterward, she ran up to the rooftop, crying and shouting at me.

"Amy, I drank too much. I have no idea why I woke up next to Brad... I swear it wasn't on purpose!"

In my previous life, Brad firmly took my hand, completely disregarded Ellie, and completed our wedding together.

However, I found out after the wedding that Ellie had passed away. She had leaped from the rooftop, dying during the time we were holding our wedding ceremony.