La saison 1 de 14-Sai no Haha a été diffusée à partir du 11 octobre 2006.

Miki Ichinose (Mirai Shida) is the girl next door. She is an average junior high school second grader,who likes spending time with her friends and prefers extra curricular activities to studying. She also enjoys dating her year-older boyfriend, Satoshi Kirino (Haruma Miura).Her teenager life, however, becomes no longer typical when she gets pregnant and decides to keep the baby…