My Sister Was the Male Lead

I was trapped inside the dating sim game [Happiness]. After failing to reach the hidden ending and experiencing death eight times, I regressed once again. Exhausted, I was about to give up on life when, “I don’t know why, but don’t do anything that stupid again.” I was unexpectedly saved by [Next-Door Sis – Extra 1]. Why? Why do you care about me? You’re just a passing extra, nothing more, nothing less. “I hope your wounds don’t last long.” It was only for a brief moment, but the impact she left on me was greater than I thought. Because of that, my resolve became even stronger. This time, my target is… “I’ve decided on you, Sister!” Then one day, an unexpected guest arrived. Did I know anyone that handsome…? “Sister, you have to marry me when I grow up.” “……” “That’s what you said.” “Wh-Who? Did I say that?” “Yeah, you did.” Wait a minute! The only person who knows about that promise besides me is one person. Could this man really be Sister…? — Description from novelcodex.orgFull novel: My Sister Was the Male Lead — read the rest free on N​o⁠v​e⁠l​C⁠o​d⁠e​x⁠.​o⁠r​g⁠