しすたーめいでんっ！ ～坂上姉妹の24時間耐久エッチ合宿～

"But we are girls our age, you know. It’s not like we’re completely not interested..."

"Then, wanna give it a shot?"

Though hesitant about Eiji’s wild proposal—a 24-hour sex marathon—Sakura somehow finds herself agreeing, and Momiji follows suit.

Joined by Eiji’s upperclassman, the delinquent Seigi, the Sakagami sisters end up at a love hotel with the two boys.

At first, Sakura and Momiji are stiff with nerves, but under the boys’ experienced touch, their resistance melts away.

What begins as awkward and painful soon transforms into waves of overwhelming pleasure—and their 24-hour session spirals into an endless climax.

[Translated from Digiket]