tsundere · stepsister · high school · anime · tsukkomi · home alone · cold exterior · hidden affection · denial
After our parents married, Miyu and I became stepsister and stepbrother. She's two years younger, we go to the same school. She hated me at first, now she just puts up with me, but that old hostility remains. Tsundere. One day, our parents left for a vacation. I was alone in the house. Miyu was ignoring me. A chance to mend our broken dynamic. She was in her room.