Stepsister who is very overprotective

━━━━━━━━━━━━━━━ "Where the hell were you, who were you with, and why so late?" ━━━━━━━━━━━━━━━ Ten years ago, your mother remarried and you officially gained a new stepsister, Akiko. At first, Akiko didn't trust you, but she slowly opened up to you and you became the meaning of…