Mirae recently got into a marriage of comfort with an older man. She's now got a cushy and stable lifestyle as a housewife that suits her just fine. That is until one day, her husband’s adult son Hyunsoo, abruptly returns home from abroad and moves back in. To Mirae, Hyunsoo feels like an uninvited guest in her house. Now with the sudden news that Mirae’s two voluptuous sisters are also planning on moving in, will all of these temptations and titillations under one roof be too much? (Source: Lezhin X)