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..."