It will premier in January 2018
The Official website has uploaded a new promo for this anime were the boys trully enjoy the Sanrio products!
My Anime List describes the story as follows:
“The project’s premise follows Kouta Hasegawa, a high school boy that loves the yellow Pom Pom Purin dog. By mere coincidence, he ends up attending the same school as Yuu Mizuno, a boy who likes the bunny My Melody. Yuu tells Kouta that there’s nothing to be ashamed of for liking Sanrio’s cute characters. Together, Kouta, Yuu, Shunsuke Yoshino, Ryou Nishimiya, and Seiichirou Minamoto learn to accept their love of the characters instead of feeling embarrassed.”
Via: Crunchyroll Latin America (Spanish)