HOT GIMMICK (Hotto Gimikku), by Miki Aihara. First published in 2000 and first published in North America in 2003.
PLOT:
Hatsumi's family lives in a giant company apartment complex lorded over by the CEO's wife. Under her watchful eye, the slightest social infraction could be cause for transfers or firings. That's why Hatsumi panics when the CEO's son Ryoki catches her buying a pregnancy test for her younger sister. He threatens to snitch unless Hatsumi becomes his slave, but the more Hatsumi learns about him, the more she's not sure what to think! Things only get more complicated when her dreamy childhood friend Azusa returns with an agenda of his own...
