Gentle Whistle, Bird, and Stone

Genre: <a href="https://fmovies-to.lol/genre/16/animation" style="color:#d9d9d9;" onmouseover="this.style.color='#00acc2';" onmouseout="this.style.color='#d9d9d9';">Animation
Director: Atsushi Wada
Cast:
Country: <a href="/country/jp" style="color:#d9d9d9;" onmouseover="this.style.color='#00acc2';" onmouseout="this.style.color='#d9d9d9';">Japan

A lot of wrong may happen, but no problem. A whistle, a bird, a stone, a human, they are gentle.