Required for the initiation of meiosis II and progression through anaphase II. ATP + L-seryl-[protein] = ADP + H(+) + O-phospho-L-seryl-[protein] ATP + L-threonyl-[protein] = ADP + H(+) + O-phospho-L-threonyl-[protein] Interacts with spo6. Belongs to the protein kinase superfamily. Ser/Thr protein kinase family. CDC7 subfamily.