Hasegawa Kouta is a completely average second-year high school student. He feels as though something is missing in his life and that it's impossible for someone like him to have a shining school life. Then one day, as he's out with his friends, Kouta encounters a missing little girl and she gives him a Pompompurin sticker for helping her find her mom. This reminds Kouta about how he used to love Pompompurin as a kid, especially because of the giant stuffed Pompompurin his beloved grandmother gave him as a birthday present, but was forced to cast that aside due to peer pressure. However, at school he picks up a lost My Melody keychain and realizes it might belong the very flashy and popular Mizuno Ryu, how is this possible?
I hate Pompompurin and you, Grandma!
!!أكره بوم بوم بورين وأكرهكِ يا جدّتي
Dich und Pom Pom Purin,
ich hasse euch alle beide!
¡Odio a Pom Pom Purin y a ti, abuela!
¡Te odio a ti y a Pom Pom Purin, abuela!
Pompompurin et mamie,
Io odio Pompompurin e odio anche te, nonna!!
Odeio o Pom Pom Purin e você, vovó!
Я ненавижу Пом Пом Пурина
и тебя, бабушка!