Eren has been working under Lance corporal Levi's command for months now. After time passes, days go by weeks too he has come to understand the once 'Humanities Strongest' is actually 'Humanities cleanliness freak' and thus Eren and others are on cleaning duty. Cleaning places he was ordered to alongside your team mates. After getting involved in an argument with Jean Eren is commanded back to Levi's office, and this is when things get a bit messy... ;)