I broke off my engagement, and when I used my previous life's older sister's BL novel as reference, the villainess started looking at me with an affectionate gaze.

"No, I don't want to marry anyone but her!" "You know, I've always wanted a cute pet." With just one comment from my girlfriend, I—a mere baron's son—ended up engaged to her, who would eventually become a villainess. That's right, just like in the BL novels my older sister from my past life had, if I show her my close and intimate relationship with her brother (my friend), surely even she might give up on me. But... why is the corner of your mouth trembling beneath your fan?