Gibo to Musume no Blues 2020 Nen Gingashinnen Special

Iwaki Akiko has been living separately with Miyuki for the past 1 year. One day, Akiko was fired from her job and returned back to Tokyo. When she visits Miyuki's apartment for the first time in a while, she sees Mugita Akira coming out from the bathroom naked with a towel and is carrying a baby. Miyuki too happens to come home at the same time. Wait, Mugita and Miyuki had a child together!?