a bitch sister who distorts otaku's friendship and sexual intercourse

A college student nerdy man who started living alone on the occasion of his enrollment. My sister, envious of such a man, often came in and out of the room. A sister who negotiates to rent her brother's room as a place to have sex with her boyfriend, but is refused because her friends come. The troubled sister was to carry out the super evil and rude idea that came up. Sad woke up as he was driving his brother into the heart. He laughs at his brother's appearance, who was destroyed and made mazo.