ADN-486: After Agreeing with My Sister-in-Law to Only Insert the First 3cm, Our Compatibility Was Too Perfect—My Cock Wouldn't Pull Out and I Creampied Her. Natsume Ayaharu

The male protagonist's older brother goes out for work and entrusts the household affairs to his wife—the sexy, voluptuous big sister-in-law. They agree to insert only the first 3 cm to avoid crossing the line. However, the sister-in-law's body matches the male protagonist's cock too perfectly, and the intense pleasure makes him unable to pull out, ultimately creampieing her directly. The restraint agreement collapses instantly, and the two immerse themselves in forbidden carnal desire. The sister-in-law's alluring body continuously demands more, as the male protagonist repeatedly inseminates and fills her womb. From the living room to the bedroom, their lewd coupling continues endlessly, with her seductive charms and moans completely conquering him. This perfectly compatible no-pullout creampie sex twists their family relationship into one of pure sexual slavery.