Des：A college otaku who started living alone after entering college. Envying such a man, my sister began to come in and out of the room frequently. The sister discussed renting her brothers room as a place to have sex with her boyfriend, but she refused because her friends were coming. The troubled sister decides to carry out an evil idea in her mind... a habit called grief that awakens when the spirit drives her brother. He mocks his brothers appearance, destroying his friendships and turning him into a masochist.