Hitoshi Ishida is a high school student who suddenly finds himself living alone after his father's company goes bankrupt and his parents run away in the night. Unlike his older sister Yuko, who lives in a dormitory on a scholarship and has excellent grades, Hitoshi, who has nothing to his name, ends up living in a shabby apartment. But then, Watanabe and Negishi say they will live together in the shabby apartment to keep an eye on things... (Source: CoMax, translated)

In the shopping district, there's a bonsai shop that's open day and night. Two young men and their pet cats take shifts managing the shop throughout the day. They offer each customer just the right bonsai to calm his or her heart. However, this shop hides a certain secret.