The absurdly funny premise reminded me of a creativity-enhancing exercise I had been taught to use when I had studied scriptwriting (and then taught myself when I found myself teaching the same subject a few years later): you'd have to take a few sheets of paper and randomly write, on one of them, 10 characters (for example: a killer, an accountant, a nurse, a truck driver, etc.), on another 10 objects (like: a dagger, a Mayan idol, a bottle of scotch, etc.), on a third one 10 places (a school, an elevator, a back alley, etc.) and on a fourth one 10 genres (mystery, comedy, horror, etc.). Then you'd fold the sheets, pile them together, and pierce through them with something sharp. At the end, you'd just unfold the sheets and select the different elements which were closer to the holes, at which point you'd have to create a plot with whatever you ended up with (which could mean something as weird as "a drug dealer, a secretary, an ancient scroll, a Playstation, a dance school, a diner, SF and romance", LOL).
Now, I honestly don't know whether the same exercise is being taught in Japan as well, but if it is, then we could guess this dorama's writer came up with "an interviewee, a detective, a love hotel, water, time-leaping and comedy"...^_^;
However the funny premise originated, though, the good thing is, it's been then pretty nicely developed with some endearing characters, a good cast (particular praises to Ohara Sakurako - too bad her singing career is making her filmography relatively short, 'cause she's not only cute as pie, but also knows how to act), some hilarious scenes (I think there's at least one or two in every episode where you'll end up laughing out loud - at least, so did I), a lovely jazzy score, and last but not least, some nice messages.
Too bad there were also a coupla weaker episodes, plus the usual portrayal of foreigners as weirdos (so common in Japanese comedies, alas) which I honestly could very well live without; otherwise I'd have given this an even higher grade!
It's still a solid "8" as far as I'm concerned, though! ^___^
Don't be discouraged by the weird premise, and for Heaven's sake, don't think - not even for a millisecond - that there might be anything remotely lewd in the "soaking wet" part, 'cause there isn't, it's a quite tasteful drama instead.