『媽媽的(de)(de)朋友5在(zai)完(wan)整有限(xian)中字』介紹(shao):描寫擁有完(wan)全不同(tong)金錢(qian)觀(guan)的(de)(de)男女同(tong)居生(sheng)(sheng)(sheng)(sheng)活(huo)的(de)(de)愛(ai)情(qing)喜劇。在(zai)玩具公(gong)司財務部(bu)工(gong)作(zuo)的(de)(de)OL女主角,因為生(sheng)(sheng)(sheng)(sheng)長背景(jing)及(ji)教育環境(jing),讓(rang)她成為節儉的(de)(de)人。追求著座右銘為「一生(sheng)(sheng)(sheng)(sheng)清貧」,事(shi)物一定都要物盡其用(yong),絕對不浪費及(ji)消(xiao)費這樣(yang)的(de)(de)生(sheng)(sheng)(sheng)(sheng)活(huo)方(fang)式,而(er)(er)男主角則是玩具公(gong)司的(de)(de)富二(er)代,生(sheng)(sheng)(sheng)(sheng)活(huo)極(ji)度(du)奢華浪費,因為過度(du)揮霍(huo)而(er)(er)激怒(nu)父親(qin),并被轉(zhuan)調(diao)至(zhi)財務部(bu),價(jia)值觀(guan)完(wan)全相(xiang)反的(de)(de)兩(liang)人,在(zai)巧(qiao)合之中莫名(ming)開始了同(tong)居生(sheng)(sheng)(sheng)(sheng)活(huo),也漸(jian)漸(jian)燃起(qi)愛(ai)情(qing)火花。