"Happy 17th Birthday Eren!" Carla says to the teen as he blows out his candles. "Well its technically tomorrow but you know Grisha and I are going to the Doctor's conference in San Diego." Saddened by his parents absence on his birthday, he knew he'd still get to spend it with his best friends so it wasn't all bad.
As Grisha Yeager, a well respected doctor came downstairs with their luggage, he looked at his son and said "Eren remember what we talked about? You can have your friends over but NO House parties and lights out by Midnight alright?" Even though he could be hard headed at times Grisha knows his son isn't the type to pull those kind of stunts, as that was more his best friend Armin's Alley. But he had to be sure.
"Grisha! The cabs here!" Carla yelled out from the front room, and hand in hand his parents left in the cab to go on their trip. And wouldn't you know like clockwork, Armin walks in the front door as Eren gets ready for school. "Yo DOUCHE BAG" Armin yells to see where Eren is. "Im up here you little shit!" Armin runs up the stairs to congratulate Eren on his birthday and give him his present.

"Armin for the 3rd year in a row you gave me weed?" Armin nods already pretty stoned before school.
"This is why were best friends" Eren replys as he takes out a little to grind up and pack in his makeshift bong.
Before school bowl? Its almost not even a question as they did it every Friday before school in almost ritualistic fashion. As they take their first hits Armin brings "it" up he'd been hinting at it heavy the past couple weeks so he knew it was a matter of time before "So Eren this house party is happening. If not for me then for you know? Her" Her being the woman of his dreams, Mikasa Akerman the queen bee of Shinganshina High, The highschool he attended. "Armin I know you weren't here just 15 minutes ago but you know for a damn fact my parents wont let that fly" Eren rips the bong and passes it to his blonde friend. The boy takes the hit, clears it and says "Look, your 17 now and this is the last year we can do this without serious trouble law wise, now or never. Shit if you agree to it, Ill invite Annie AND help you invite Mikasa" Eren blushes "ugh fine, but you have to invite Annie, you've loved her longer than i've even known Mikasa!" Armin speaks up and says "DEAL now lets get to school we'll be late, nerd!"
They put everything up and begin the treck to school, for they had a lot of work to do.