Are We Heading for a Happy Ending? (NaN)

Nam-cheol and Joo-hee have been living together for three years. One day, their landlord raises the rent, and the increased deposit becomes a burden. They search for a new place but find only worse options. Nam-cheol's mother, Yoon-jeong, hears about youth rental housing and asks him to apply, wanting to live separately. Meanwhile, Joo-hee is advised to apply for newlywed housing. Torn between his mother's wish and his girlfriend's desire for marriage, Nam-cheol faces a tough decision. Are they heading for a happy ending?