We open the series with Chiga having just been suddenly appointed vice president of the student council (it's rumored the previous vice president was fired after jumping the president, Kokusai). Chiga happens to see Kokusai get groped on the train on the way to school (and then later in the train station, and at school, and...) and realizes the rumor might be true after all. Chiga takes it upon himself to be a sort of anti-harassment bodyguard for Kokusai, and of course the more time they spend together, the more attracted to each other they start becoming. Eventually Plot rears its ugly head (in the form of a stalker, and a missing niece and some weird crap about some college OBs and their angsty relationship), but Chiga and Kokusai's relationship is definitely the main focus. For the better part of the series (so far), Kokusai and Chiga have been totally crazy about each other, but each thinking the other is not interested in the other, resulting in lots of pining, longing, and painful misunderstandings designed to tug at the readers' heartstrings. (And, in my case anyway, it totally works.) It's also chock full of hilarious gags and puns (my personal favorite: when Kokusai is trying to tell Chiga that he's bleeding but Chiga doesn't get it because everything just sounds like his name: "知賀!違っ--血が!" etc etc.)