 At the last chapter of "School Rumble", he starts to remember more about Tenma and 2-C.

Karasuma is secretly a famous manga artist, publishing his works under the pen name of .Harima, who really admired his manga, discovers this while pursuing his own manga artist ambitions.When he learns that Tenma was in love with Karasuma his respect turns into hatred, until Harima reconciles with himself internally that what he wants is for Tenma to be happy.