Ai Yori Aoshi [Superlite 2000] Japan

Ai Yori Aoshi is a Japanese seinen manga written and illustrated by Kou Fumizuki and serialized from 1998 to 2005 in Hakusensha's Young Animal. It is a love story between two characters who have not seen each other in years but were once childhood friends. Literally translated, the title means 'Bluer Than Indigo'.