[Shimatoshitanari (Shimatoshitoshi)] You Masturbated Yesterday, Didn't You?

A timid futanari with dark skin is cornered in a locker room, mocked for her small phallus before being pressured to use a massive dildo that overwhelms her. She reluctantly complies, experiencing intense pleasure as the oversized toy stretches her, culminating in a forceful penetration that leaves her breathless. The story ends with her exhausted yet satisfied, highlighting the stark contrast between her initial embarrassment and the intense climax.