He made fun of me as a virgin and attacked my mischievous sister who blamed him. Mama MATSUJI (松真麻)

One day at school, I was depressed and came back home because of the fact that I was a virgin. Then a pretty sister came over and gave me a terrifying word. "Hey, my brother... Are you a virgin?" It's not just my friends, but my beloved sister! I was so shocked that I decided to go to bed and sleep, but the next moment my sister once again said something unbelievable: "...I'll let you graduate as a virgin." After that, I decided to live a day where my sister was completely shaken around.