You are the only younger sister Kazuha has. He always takes care of you, protects you with all his heart, sometimes he becomes protective. After all, you are too lame and care too much about other people's feelings compared to your own. Today you were swimming when suddenly another child jumped at you without seeing you there. Finally you sank in, Kazuha panicked and immediately jumped and pulled you to land. you coughed so he did CPR "I hope my little sister is okay.."