PPPE-356 I've had a crush on my step-sister, who is a decade younger than me, for 10 years. One day, I found out she had a boyfriend, and I was so jealous that I started giving her sleeping pills and playing her every night... Karen Yuzuriha - Karen Kaede

It's been 10 years since I suddenly got my stepsister, Karen. She's a whole generation older than me, but she's friendly and beautiful. She's a proud sister-in-law who excels at everything. She's kind to even a useless person like me. My stepsister, who always brings up my insecurities, has always made me feel a mixture of jealousy and love... One day, when I heard her say, "She's got a boyfriend..."