[Itou] Limit ~Genkai~ (Ougon no Sonata XXX Sono San)

Saki has turned exam cramming into an extreme sport, multitasking on the toilet with a toy while clenching back her bowels for what she calls maximum effect. One overloaded bento later, she's sweating and clutching her plump ass on the walk home until classmate Masaki 'helps' by plugging her up and pounding her tight asshole, a combination that ends in a spectacular explosive blowout. Undeterred by the mess—or her precious study schedule—she casually promises a round two the next time nature calls.