Trying to live with another family can never be an easy task. The Do siblings are learning this lesson as they try to share a household with the rather bubbly Park siblings. Trying to maintain their calm composure is never easy when the three Park siblings are around.Three of the Do siblings seem to have their own little problem. Kyungsoo and his rather artistic stalker Yeonjae, Myungsoo and his rivalry with Jaeyeol, and Hyesoo with her rather annoying problem with Chanyeol. The only one able to stop all the trouble is the maknae of the Do siblings, Jisoo. Fortunately they have neighbors like the Kim siblings who help....sometimes....

Kyungsoo- the eldest of the Do siblings who tries to avoid Yeonjae at all cost.

he seems to be hiding something...

Hyesoo - the eldest female and also Kyungsoo's twin. Born only 7 seconds after him.

She seems to be interested in someone other than her annoying problem.

Myungsoo - The hot head of the Do siblings.

He can't seeem to control himself around Jaeyeol and always ends up fighting with him.

Jisoo - The maknae of the Do siblings and also the only one able to break up all the chaos that happens.

Like her oppa Kyungsoo, she seems to be hiding something.