Hiyama Kentarou no Ninshin: Ikuji Hen

The series picks up three years after Kotaro's birth and focuses on Kentaro and Aki trying to raise Kotaro despite their conflicting work schedules. They begin to consider the possibility of living together and having another child. Meanwhile, pop sensation Seiya Aoyagi has become pregnant with fellow pop singer Asakawa Sakura's baby and decides to raise it, causing a rift between them. Kentaro's boss, Hiromi Shimomura becomes pregnant with his mistress' baby. He is in denial, but must come to terms with the growing evidence of his adultery.

(Source: Wikipedia)