Live streamer Mahee, also known as Mahiro, is becoming increasingly popular thanks to her Ke'ai face, casual chats and game streaming. Meanwhile, her brother, a reclusive NEET, is the polar opposite of Mahiro, and has been looking at her sexually for many years, but he has also been growing increasingly jealous. Mahiro is held in resentment, and is exposed to the whole world as she is creampied during a stream, and from then on, she is forced to satisfy her brother's sexual desires...