Hello, My Twenties!

Jin-myung gets excited when she finds her housemates waiting to pick her up from the airport, but for some reason, they don't seem happy to see her.

With their landlady pressing them to pick a new housemate soon, the Belle Epoque quartet has no other choice but to lower their standards ... a lot.

As Eun-jae and Ye-eun try to cope with the stresses of a new semester, Ji-won is still her usual perky self, but something keeps troubling her.

Returning home and finding a strange man in their bathroom, Ji-won, Ye-eun and Eun-jae panic, but it's Jo Eun who seems especially traumatized.

As Jo Eun struggles to define her friendship with Ye-ji, Eun-jae frantically searches for a way to undo the message she sent to Jong-yeol by accident.

Ye-eun teaches the housemates tricks to win over guys' hearts, which Ji-won uses on Sung-min to make him join her quest to recover her lost memories.

Suspecting Kwon Ho-chang to be the sender of the unpleasant text message, Ye-eun enlists Ji-won's help in figuring out what kind of person he is.

After hearing the alarming news about Ye-eun's ex-boyfriend from her lawyer, the housemates remind one another to be extra careful from now on.

Ye-eun is certain the letter is meant for her. Ji-won, Eun-jae and Jo Eun visit the bookstore to find the owner of the book that contained the letter.

As the housemates fail to console Ye-eun, help comes from I-na, who makes a surprise visit. I-na also sheds light on where the pink letter is from.

The unidentified assailant demands to know why the housemates came looking for "Joanne" and provides a crucial piece of information about the letter.

Using Ji-won as an excuse, Jin-myung convinces the housemates to go apple picking. But in fact, everyone -- not just Ji-won -- needs a little break.

The housemates surprise Eun-jae with a small party when she returns from meeting with Jong-yeol. Ji-won visits her elementary school art teacher.

All the pieces of Ji-won's childhood memory finally come together. Meanwhile, Jin-myung stresses over keeping the "promise" she made to Heimdal.