In the crime-ridden district of WESTSIDE, where arson, theft, and extortion occur daily, a man encounters a rogue maid who never attended maid training academy. Taking her in, he decides to train her and raise her into a first-class maid. MAO, who grew up in harsh conditions, gradually opens her heart as she experiences the man's kindness. Between them, growth and deep bond begin to form. However, their peaceful days come to an abrupt end with a sudden separation. This is a poignant story depicting the meeting and parting of two outcasts.