On the occasion of my older brother's wedding, I went to the countryside to meet the family of his soon-to-be wife. Surprisingly, his future sister-in-law turned out to be my high school sweetheart. Seeing my embarrassment, she deliberately brought up the past, making me worry about the possibility of my older brother finding out about our previous relationship. After the introduction, I went to my room and immersed myself in thoughts. At that moment, she suddenly appeared, reminiscing about our unfinished youth memories.