Dirty Yuri (Patreon)

[weight gain, immobile], dA link, Twitter link, Google Drive link 

Yuri's got a hunch about her best friend (or secret crush?). She's normally not very charismatic, but she's able to convince the others just this one time. You can probably guess from this description alone what she was able to convince them of. :V

Funnies in the attachments. :^)

Script -- trmtum, nametaken

Yuri -- Monstrassa

Natsuki -- Erichi

Sayori -- Aurora Nightigale

Monika -- Trina Deuhart