Scenario 1:
Crush likes someone & wants to make them jealous by pretending (Y/N) is their (girlfriend/boyfriend) but ends up falling in love with (Y/N)
Scenario 2:
Crush keeps getting chased by fangirls/fanboys & decides that the only way to stop them is to say (Y/N) is their (girlfriend/boyfriend) but ends up falling in love with (Y/N)
Scenario 3:
Crush accidentally ends up lying to the media saying that that (Y/N) is their (girlfriend/boyfriend) & has (Y/N) pretend to be their (girlfriend/boyfriend) but ends up falling in love with (Y/N)