Season 1

Tae Woo, Hoo, Hanna, EB, and Ji Han decide to go to a party. But there are actually dangers that were to come.

Hoo's mother gets a call from Hoo's homeroom teacher. The conflict between Hoo and his mother worsens as due to misunderstandings and miscommunications.

Hanna is invited to Seoul Fashion Week! However, Hoo doesn't approve of Hanna's Seoul dream.

Between a mother with a new boyfriend and a super strict father, Ji Han gets exhausted. Ji Han finally decides something and calls everyone out to meet up on the bridge and delivers his most honest and sincere story.

Cops suddenly show up at Hoo's door. Tae Woo also is in panic because of a summons in his mailbox. As everyone is lost for words, Hoo silently approaches the tattoo artist with an offer.

Everyone is having a headache because of a complete mess they created with the Sam Duk kids and the tattooshop owner. What discipline has become to each others' discipline?