Bea-chwan's manga / #Complete(1)

Shiro, a stern looking secretary is obsess with rabbits. But due to his scary looking face most of the rabbits are afraid of him. One day he met a rabbit with an adorable caretaker who is always hungry. While spending time with the two Shiro realizes that his heart is beating non-stop. "What is the reason for this feeling?" "Can Shiro finally know the answer?"