Raw: https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_562633/
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完了啊，这国考好难啊，120分钟怎么能做完135道题。。。

[Synopsis]

Touga, the protagonist, is involved in doujin activities with his childhood friend and best friend, Misora.
Touga visits Misora's house to finish a manuscript before an event deadline but his true purpose is something else...?!
After finishing the manuscript, Misora's younger sister, Ichika, shows up.
Touga is actually having a casual sex relationship with Ichika and on this day, he decides to get cozy with her, hiding it from Misora.
Then, suddenly, Ichika changes into a sexy cow costume that Misora ​​bought for manga reference, sending Touga's pent-up sexual desire spiraling out of control!
He ends up milked dry to the limit by the temptation of Ichika's huge tits!?
How far can he go without Misora ​​finding out...?!

This is a female-dominated love story in which he is seduced by a slutty younger woman.

Illustration: アユ次郎
X (Twitter): @ayujiro303
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X (Twitter): @douzin_mittuman

Base +28, Fofotron +26, nuts987 +14