noun
A romantic relationship, often with a connotation of being extramarital or secretive, similar to the English term.
彼は既婚者なのに、職場の同僚とラブアフェアを持っているらしい。
Even though he's married, he seems to be having a love affair with a coworker.
Loanword from English 'love affair', adopted into Japanese with katakana spelling.