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, Hasegawa Kouta, am a completely normal
and average second-year high school student,
أنا، هاسيغاوا كوتا، شخصٌ طبيعيٌّ تماماً
،وتلميذ سنة ثانية عاديّ في الثانويّة
Meine Meinung sei dahingestellt, dass ich,
Yo, Kouta Hasegawa, soy un estudiante
normal de segundo de preparatoria,
Yo, Kouta Hasegawa, soy un estudiante
de segundo de secundaria superior
Comme dit précédemment,
Io sono Hasegawa Kouta, uno studente di seconda 
superiore, nella media sotto ogni punto di vista,
Eu, Hasegawa Kouta, sou um estudante
do segundo ano completamente normal,
Я самый обычный ученик 
второго класса старшей школы.