Tadashi is a high school student and computer-game addict. After a long day spent playing the game Zenon, he is visited in a dream by the heroine, Sartova. In an anime replay of The Last Starfighter, she takes him to the world of Zenon, where the game is played with human lives at stake.
The show starts with our hero Hiroshi easily defeating an arcade machine, impressing all of his nerdy friends. When he gets home, he finds a bizarre new game waiting for him on his computer. The game promises him a chance at winning the heart of a beautiful girl, so Hiroshi presses "Yes" to begin...only to have the screen turn to static right in front of him.
Skip to the next day. Hiroshi starts telling his friends about this game, and they aren't sure what to believe. But right then, in the middle of the class, a huge electrical storm hits, leaving in its wake a lone white egg. When Hiroshi touches it, the egg opens, revealing a beautiful (and stark naked) green-haired girl.
This girl, Hiroko, gives Hiroshi the name Zenon and gives him all sorts of powers, including ESP. That's all well and good, but right afterwards all the way to the very end, Hiroshi/Zenon winds up battling all sorts of evil bad guys and huge meanies non-stop to protect his new sweetheart.
This is one of those series designed entirely to appeal to the fantasies of nerds rather than actually be about anything. The protagonist is a generic nerd who's good at video games and has poor luck with women. So of course a naked lady shows up, insists that he immediately touch her breast, then gives him super powers that draw upon his gaming skills. And of course she constantly has to be rescued to show how heroic and many the protagonist is.
Most of the runtime is made up of fight scenes, which are mostly directed competently, but the punch is taken out
of them by the fact that the protagonist tends to win by pulling out powers that there was no previous indication that he had. Like he suddenly has ice powers a half hour in. They try to have some mystery in the plot as to why this is happening, but it's still very bare bones, and the answer doesn't make a whole lot of sense.
I do have to say that the pacing is about what it should be, and they keep it from ever quite getting boring. Sadly, I almost wish the writing and directing were worse, since that might have made it bad in a more interesting way. What we have here is more forgettable than anything else.