Love Hina is a 14 Volume manga about a 20 year old ronin (test retaker) Keitaro. When he was a little kid, 14 years, he and an unknown girl promised to go to Tokyo University together. Motivated still by that promise, he tried to get into the school but failed twice already. He got kicked out of his home, and has no money left. He is also unattractive and never had any girlfriend
in his life. A loser, really. But out of the blue, his elder tells him to be the manager at Hinata Inn, only when he goes there, it is an all-girl dormitory...while they're in the Hot Springs.
There's several girls living there, including the sly Mitsune, the kendo girl Motoko, and Naru. The main story focuses on Naru and Keitaru, and feelings that forms between them over time, and Keitaru wondering if Naru really is that girl from the past.
There's too much good to say about it, you need to read it. I highly reccommend it to anyone.
You better be sure your parents are not in the same room when you are reading this, it could get pretty...mature at times. It never goes too far, and it's always for humour, but just to be safe...
Don't bother watching the anime, it's a sub-par adaptation. It's good on it's own, I guess, but certainly not in correlation with the manga.
"Pervert!" - Naru