Oikawa Hiromi

  Hiromi is the main male character and super GENIUS of the series. He was Lili's childhood friend in kindergarten until he moved to America for studying criminal psychology. He's allergic to girls, caused by Lili when she didn't respond to Hiromi's love letter he wrote to her, and gets rashes everywhere when touched by a girl. He was nicknamed "Hiro" in kindergarten. He has a crush on Lili. It is often shown by his acting bitter and sarcastic to her. Many people in the manga notice this and point this out, but Lili never realizes this. Only in the near end does Lili notice Hiromi's true feelings for her.

[Wikipedia]