"Mamotte Shugogetten!" is an anime series (only available via
fansub) based on the manga series written by Minene Sakurano.
The man character is Tasuke Shichiri, an ordinary school boy who
is living alone, since his father and sister are off being
archeologists and his mother is off traveling. His life is
perfectly ordinary until his dad sends him something he found at a
Chinese archeological site, an octagonal bracelet made of some
purple metal. When he looks through the bracelet, a girl pops
out. She is Shaolin, a shugogetten (moon spirit), who's
duty is to protect Tasuke from harm; her powers are derived from
the bracelet, the shitenrin, with which she can summon
"star gods" to do various things.
Unfortunately, Shaolin is completely unfamiliar with the modern
world, and is much more likely to cause situations that Tasuke
needs protection from than to just protect him. In fact, both the
title and his name are partially jokes. "taskue" means "help",
which Taskue cries out for quite often, and "mamotte" means "save
me"; the title literally translates as "Save me, heavenly moon
spirit!".
Soon after receiving Shaolin's shitenrin, his dad sends him
another object, a pipe-like wand. Apparently not one to learn
from experience, Tasuke looks through the pipe, and out pops
Ruuan, a keikounitten (sun spirit), who's duty it is to
make Tasuke happy; her powers are derived from her wand, the
kokutentou, which she can use to bring life to inanimate
objects, from food to buildings to the clothes someone is wearing.
Since Tasuke generally refuses to tell her what would make him
happy, she starts deciding for herself what will make him happy;
thus, just like Shaolin more often gets Tasuke in trouble than
save him, Ruuan more often makes him unhappy than happy.
Ruuan and Shaolin have met and fought 1851 times before, because
they kept on ending up with masters who were fighting, and she
refuses to get along with Shaolin, even though they have the same
master now. She wants to be Tasuke's only spirit, and is always
plotting to ruin the relationship that Shaolin and he have. She
manages to become the teacher of Tasuke's class, and Shaolin
manages to become a transfer student to his class; thus, his
classroom is a daily exercise in chaos and destruction rather than
learning.
Tasuke's two best friends, Takashi Nomura and Koichirou Endou,
fall in love with Shaolin and Ruuan respectively. Later Izumo
Miyauchi, a priest and playboy, falls in love with Shaolin. And
eventually Kaori Aihara, another student at Tasuke's school, falls
in love with him. Thus there's a big love tangle in addition to
the fun random destruction.