There are still monsters about, and the gang is spending their days fighting them.  They go to school during the day, and when they're not at school, they protect the city from monsters.  But their peaceful routine is interrupted by the arrival of Mana Livingstone: a transfer student from America who's got the craziest ideas about Japan!
Well, now that spring break's over,
Nun ja, da die Frühlingsferien vorbei sind,
wird es für uns umso härter.
Ahora que las vacaciones terminaron
Con las vacaciones ya acabadas
Les vacances de printemps sont finies,
ça risque d’être dur, maintenant,
Beh, con la fine delle vacanze primaverili,
Como as férias acabam agora, talvez 
daqui pra frente seja um pouco difícil.