This is a posable action figure from the Nendoroid series.
From the Good Smile Company website:
From the popular anime series and manga "Haikyu!!" comes a Nendoroid of the Nekoma High School Volleyball Team's setter, also said to be the 'backbone', 'brains' and 'heart' of the team - Kenma Kozume! He comes with three expression parts including a standard face, a smiling face as well as a bit of a shameful embarrassed expression.
He also comes a variety of optional parts that allow you to recreate popular scenes from the series, as well as a volleyball and a base made in the image of a volleyball court. His smartphone, a black cat as well as parts to display him sitting on the floor are also all included, allowing fans to enjoy various situations of the rather bashful Kenma!