Yamada Momoka is your average 16 year old girl. Her family consists of herself, her dad who works at a TV station, and her mom. Apparently she also has a strict prune of a grandma, but who doesnt? Except that the grandma, Yamada Tamaki, had an accident at the TV station where she got electrocuted and now looks like a 16 year old Yamato Nadeshiko. It isnt easy for Momoka when her grandma arbitrarily decides to attend Momokas high school as a student as well. Tamaki isnt just pretty, shes also very cultured, well-mannered, and still maintains her old-fashioned streak from her 65 years of wisdom. Its bad enough when Momoka starts being referred to as Old Yamada and her grandma (Tamaki) referred to as New Yamada, but its even worse when Momokas crush on a dashing young man starts to take an interest in Tamaki as well. Fight-o, Momoka! Protect your beloved grandma, Momoka! And dont let her walk off with your boytoy, Momoka!