They all lived on a flat with 7 roommates, each had dreams and aspirations of making it big in the large city. They were thriving individual with dreams to make it on their own, but dreams don't come as easily without hard work so they had no choice but to stick together and share out the large apartment amongst the 7 of them. Living alone was too costly, and none had family living in Seoul. Each had their own backgrounds.  With seven very different individual under one roof there were rules to follow along with divided chores, food, and other living expenses. 

Kim Sunggyu: House/Flat owner. He rents out his space to 6 other people to help pay for mortgage, expenses, and bills because living in the city alone gets expensive, even though the house was given to him by his parents.

Nam Woohyun: College student studying business to open his own resturant one day, and Sunggyu's boyfriend. Originally Sunggyu's first roommate amongst the seven.

Myungyeol: When there is Myung there is Yeol. They stick together like glue. Why? Because they are married. Both Myungsoo and Sungyeol were high school sweethearts from a smaller town, but after graduating they decided to move out of their parents house to get married. They are the only married couple in the house, even thought Woohyun and Sunggyu acts more like a married couple. 

Kim Myungsoo is a photographer/ part time teaches guitar lessons to kids and young adults and Lee/Kim Sungyeol works part-time with Woohyun as a barista at a Cafe. They both also still in college. Their other 5 roommates sometimes forgets they are married because the couple act more like they are boyfriends. 

Lee Howon: Howon/Hoya is a dance teacher specializing in modern/hip hop dance. His dream is to become famous enough to coach/train idols and form his own dance company. Shares room with 6 housemates to save money and open his own dance studio. 

Jang Dongwoo: Another Dance teacher who works with Hoya, and his long time friend/roommate. They share similar dreams and decided to split off expenses by moving together with the five other people of infinite house to help save up for dance studio.

Lee Sungjong: The youngest and most diva of the group. He is still a college student focus on his studies. His parents sent him to the city to study. Sunggyu's flat is closest to his University and was most affordable.