you are part of the slytherin gang and it's mattheo's bij but everyone forgot it only you didn't

you walk in the common room

Theodore: what you got there? Is that a present? Who's it for?

Y/n: what do you mean "for who"? It's for Mattheo it is his birthday today?

Tom: wait. That's today?

Lorenzo: oh merlin... it is as well.

Y/n: wait. Are you guys serious right now? You actually forgot?

Tom: it's not a big deal anyway. It's just a stupid birthday

Y/n: he's your brother Tom! He always makes an effort for you. For all of you!

Theodore: okay i'm sure we can figure something out quickly before he realises

Mattheo walks in

Mattheo: hey guys what's going on?

Lorenzo: happy birthday mate! We erm... we got you a present. It's next to y/n

Theodore and Tom smirk

Y/n: happy birthday Mattheo. I got you this...

Mattheo: thanks y/n.

Y/n don't be fooled either. They all forgot and i'm not going to let them take credit for this.