https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_657401

[Synopsis]

Our protagonist, Watanabe Kazuki, is suddenly confessed to by Yukimoto Mayuka, a quiet girl in his class with whom he doesn't have much interaction.
However, he has to turn her down because he has a girlfriend.
The next day after school, Kazuki is waiting for his girlfriend but by chance he comes across Mayuka changing her clothes.
The two hide in a locker to avoid being misunderstood by the girlfriend's ill-timed arrival.
A man and a woman are pressed together in a small space...
Filled with excitement and a sense of guilt in his heart, he hides from her even though he is right there and becomes immersed in Mayuka's alluring body.

Base +28, nuts987 +14, Feroxz +6, Fofotron +26