Working part-time with a house cleaning service, 16-year-old Tenichi Iemori dreams of one day building a cozy house for himself. He is content with his peaceful daily life, but as he starts his second year of high school, things begin to change. A popular makeup company president Himari Yoshino transfers into his class, and Iemori is placed in charge of looking after her for the day! After surviving the day with Yoshino, Iemori heads over to clean the apartment of a new client. Upon his arrival, he is shocked to discover that the luxurious apartment is a complete mess, but what shocks him the most is the resident of the apartment—Yoshino! Although Yoshino is hesitant to let a classmate work for her, Iemori quickly proves his worth, leading her to entrust him with the job. And even though the two must keep their arrangement a secret to avoid unnecessary rumors, they gradually begin to get more comfortable in each other's company. [Written by MAL Rewrite]