୧••୨｡Series timeline in order -
1) Itsuka koi ni naru made - (Chiaki and Kazuma starts relationship during highschool)
2) Akete mo Kurete mo: Zoku - Itsuka Koi ni naru made - (Lovers Chiaki and Kazuma moved 2 tokyo)
-> 3) Kazoku ni Narouyo - (Chiaki and Kazuma raising their friends child)
Kazoku Ni Narouyo