Michiru Aida (Masami Nagasawa) works as an assistant in a beauty salon and is often criticized by her colleagues. When she returns home, she has to face her mother who is an alcoholic and brings men home. For her, life is a mess. So when her boyfriend Sosuke Oikawa (Ryo Nishikido) asks her to live together, she agrees with a vision of the future. When Michiru was buying daily necessities for her new home, she was unaware of the surprised look of Ruka Kishimoto (Juri Ueno) behind her. In order to catch up with Michiru who was taking the bus, Ruka accidentally bumped into Takeshi Mizushima (Eita) who had noticed her in the home furnishing store. Ruka and Michiru were junior high school classmates. Ruka had an unspeakable secret in her heart. After catching up with Michiru, the two had a happy gathering. Now Ruka lives in a sharehouse with her friend Eri. When she heard Michiru happily talking about living with her boyfriend, Ruka's eyes flashed with a trace of complicated emotions. However, happiness did not come to Michiru. Due to his suspicion and sensitivity, Soyou checked Michiru's mobile phone messages and misunderstood that Ruka was a man and beat Michiru. Michiru, who escaped, instinctively called Ruka. Ruka took her back to the sharehouse and found that Xiaowu was about to join SH. Four young people gathered under one roof, with hope for the future and their own problems, and were about to stage a life drama that they could not predict.