Hikaru Genji Plan, a reference to Murasaki Shikibu's The Tale of Genji with its protagonist, Hikaru Genji is famous for his fondness of much younger girls, children to be exact. And he even kidnapped Murasaki no Ue at age of 8 after her grandmother who was raising her died and brought her up himself to make her his unofficial wife after his wife Aoi no Ue's death.

Thus, Hikaru Genji Plan means raising up a child (girl) to have her satisfies the lust for beauty after a long time. Also, Reverse Hikaru Genji Plan (Mahou Sensei Negima, chapter 120) is that with the child gender being male.

Demundo said:
Thus, Hikaru Genji Plan means raising up a child (girl) to have her satisfies the lust for beauty after a long time. Also, Reverse Hikaru Genji Plan (Mahou Sensei Negima, chapter 120) is that with the child gender being male.

Should've known these 2 were up to no good again.