Shounen ga Otona ni Natta Natsu, Episode 1 Raw

少年が大人になった夏 / Shounen ga Otona ni Natta Natsu

#1. 少年が大人になった夏 第一話[ジャイロウ] / Shounen ga Otona ni Natta Natsu [Jairou]

The main character, Ryuki Kirishima, lost his parents in a car accident at a young age and lives alone with his older sister, Reiko.
He feels that Reiko is the greatest person in the world.
Gathering in a warehouse at the secret base, Ryuki watches a video of “Kiril-sama,” a supernova who is the talk of the town on adult video sites.
She has big soft tits, a beautiful waistline that could be described as perfect, and an overwhelmingly fleshy ass.
Ryuki had never reacted to pornographic videos before, but Kiril was different.
Kiril suddenly appears, completely naked, and the two have an unforgettable summer together.