That's the promise (yakusoku) Keitaro made with a cute little girl 15 years
ago in Hinata-sou. Just when he reached the time to get to Toudai (Tokyo University),
he couldn't remember the girl's identity (or maybe he never knew about it
anyway). Well, a promise is promise, he tried his best to get into Toudai,
but has failed several times in the entrance exam. If not for his childhood
promise, Keitaro wouldn't have such a determination. Despite the failures,
he's really a lucky man to live under the same roof with beautiful girls:
Naru, Mitsune, Shinobu, Motoko, and Kaolla.
It's still a question whether Keitaro finally finds his love in Toudai or
not. Which one of the girls will have Keitaro's heart?Will Keitaro every get
into Toudai? Will he ever find the girl he promised to?
All these question will be answered in the Anime or Manga version of Love
Hina. So to find out WATCH IT OR READ IT :)