>>1845404Mami: Hey, hey, Nagisa-chan! Today's the pantsu day! On this occasion let's show each other our panties! Yes, let's do it, let's do it!
Nagisa: Erm, Mami? Did someone chew on your head again or something? We have to go to the hospital.
Sfx: Huh?
Mami: What's wrong with you, acting all grown up! It's a holiday, so let's take the chance to deepen our friendship.
Nagisa: Uwa! It's not a holiday!! You forgot to ask me if we should do it!!
Mami: Hehe, what's that? After all you want to see it yourself, don't you? Alright... I'll go first...
Sfx: Whoopsie
Actually says "Maicching", the catchphrase of a certain Machiko-sensei. I can't translate it, sorry: https://en.wikipedia.org/wiki/Miss_MachikoNagisa: Hello, Homura-san? Mami is all messed up, can you come fix her again?
Sfx: Ewww