Help please help

Hi guys ... I've been looking for Yaoi Manga I read a long time ago, and now I can't find it ... The first chapter events revolve around two childhood friends ... the Seme when he was young his healthy was not good so the uke was always visiting him and entering the seme room through The window and that by jumping on a tree next to the room window .. One day the Seme did not want the uke to leave, so he broke the tree trunk ... And after that when the uke wanted to leave, he jumped on the tree and the trunk was broken and he fell on his head and this affected his body. And made his dick size not growing bigger and stays small even when he reached. And the events continue while they were in school ... Finally, I don’t remember the name of the manga. I hope that you know it . Tell me it name Please