Detective Opera Milky Holmes SS - Goodbye - Kogi-chan - Long Goodby Forever

Original title: 探偵オペラ　ミルキィホームズSS～さようなら、小衣ちゃん。ロング・グッドバイ・フォーエバーよ永遠に・・・

Directed by Makoto Moriwaki

After some pushing by Irene and her father and a lack of support otherwise, Kokoro stubbornly quits her job as a police detective to become an idol. She soon finds the idol life draining and starts to miss her old detective life. When Henriette notices Sherlock's loneliness without her, she stages a statue theft in order to convince Kokoro to return to the force.