Ep 17 – “Big Brother, Why Is This Happening?” / “Onii-sama, Nande Konna Koto ni Naruwake?” (おにいさま、なんでこんなことになるわけ!?)

Kouhei feels powerless to protect Hazuki, he wants to train in the art of supernatural powers. Kouhei experiments this by himself. Will this lead him in trouble?