No premiere date or PV yet. Check out the Crunchyroll article for additional information. Synopsis from AniList:
Uichi, once a happy and popular boy, is now the victim of cruel bullying. Then suddenly Yotsuba, his childhood friend and first love, shows up. How will this cute and kind-hearted girl try to help him…?
Drat, for a second there, I thought it was an adaptation of Yotsubato by Kiyohiku Azuma. I’m sure it’ll still be a good show.