Reiya, Taiyo, and Momo are a close-knit trio from the same university. While Taiyo and Momo are dating, Reiya sees an opportunity when they have a minor argument and takes advantage of Momo. Momo falls into pleasure from the intense sex that's different from Taiyo's... She even begs him, "Please cum inside me..." Just then, Taiyo returns to find a shocking sight...