Marie grows flustered around Arthur, and he realizes something is up. How much longer can her secret keep?

Marie struggles to act out a convincing "Girlfriend Mode" for Arthur and runs afoul of a wily new assassin.

Arthur refuses to rest despite a bad cold. Marie tries to help and confronts her feelings in the process.

Marie struggles to keep her cool around Arthur now that she realizes how she feels about him.

Arthur's birthday sneaks up on Marie. When he reveals he loathes the day, she sets out to make it a happy one.

A boy named Daryl introduces himself as misanthropic Arthur's best friend. What is their connection really?

Arthur kicks off summer break by taking Marie to a tropical island, but private moments prove hard to come by.

With Arthur busy, Marie tries to befriend his fan club, but her plans to win them over soon misfire.

Arthur is committed to keeping Marie's secret, but acting as oblivious as he used to proves a tall order.

Any pretense of secrecy ends when Arthur and Marie get locked in the bath together.

Marie infiltrates Maynard's mansion in search of an antidote to the poison that took Arthur's memory.