Akane-kun Destiny 

The "son" that I've lovingly raised for 18 years is now suddenly my "lover"!? Akane is a handsome high school boy and Kyouji is a nursery school teacher who refers to himself as Akane's "father". Kyouji has been looking after Akane ever since he was a baby but on the latter's 18th birthday, Akane gave Kyouji a shocking confession!? (Source: Gentosha, translated) Notes: - All chapters were split into two parts in the original serialization and later combined in the volume release. - Includes one extra chapter.