Saezuru Tori wa Habatakanai, also known as Twittering Birds Never Fly, is a Japanese boys' love manga series written and illustrated by Kou Yoneda. The story delves into the complex and often dark relationship between a powerful yakuza boss and his enigmatic bodyguard. It explores themes of desire, control, and emotional turmoil. The manga has been adapted into an animated film, gaining recognition for its mature storytelling and intricate character development.