The Daily Lives of High School Boys, v. 1 by Yasunobu Yamauchi

 

Tadakuni, Yoshitake, and Hidenori are three friends that attend an all boys school.  These are their adventures -- talking about girls, telling scary stories, going to the beach, and more.

This is a great slice-of-life manga series featuring boys and their friendship.  This would be a great series for both teen boys and girls.