Minato is a total loser. He"s failed to make it into college twice, he"s unpopular with women, and he"s unemployed. He seems like the classic-useless-shounen-harem-male-lead...
In truth, however he"s actually an Ashikabi--one of a mysterious set of "masters" in an awesome battle royale between hordes of cute girls called "Sekirei." 
Since this is an ecchi manga, with their attacks they often happen to... you guessed it--ripping each others" clothes off! Looks like his luck"s taken a turn for the better.