After my father's misfortune, Ayaka and I decided to go back to my parents' house where my younger brother, who is a recluse, lives. He doesn't work and spends all his time playing games. He even peeks into Ayaka's bath and looks through her underwear. I started to treat him more strictly from that day on, so as not to worry Ayaka. Then, a few days later, I noticed that the two of them were acting strangely, and I had a strange feeling in my heart, but I believed that my fears were just in my head. Until I saw photos of Ayaka hanging all over my brother's room.