Filter-Goshi no Kanojo

From Yen Press: After his first and last attempt to smile cleared an entire playground and left him totally friendless, Narumi Hakobe has perfected his poker face. Now in high school, stone-faced Narumi’s only hobby is keeping up with posts from Efa, his favorite racy social media icon. But when he discovers that Efa’s actually his perfect, popular classmate Koto Mitsuha, Narumi gets roped into helping her make content! Can Narumi keep things under wraps, or is he about to become a social outcast all over again?