Shouta Kanda, who returned to his hometown after entering high school, reunites with Sanae Kondo, a clumsy childhood friend of his when he was in kindergarten, he clearly remembers how clumsy she was, but thinks that she's most likely grown out of it, until…
Ponko Tsundere na Osananajimi is a completed manga by Umitsuki Reona. It blends romance and comedy. You can read all 14 available chapters of Ponko Tsundere na Osananajimi online for free on MangaPulse; the newest is Chapter 8.6, added 2020-07-12. The series is finished, so you can read it from start to end in one go.