The handsome university student Kirie Ukita has been living his life avoiding interactions with others due to past trauma.
For Kirie, his kind and well-liked part-time job senior, Yukimura, was someone who stirred up his inferiority complex.
One night, while passing by a park, Kirie witnesses Yukimura being assaulted by a male junior. Though he instinctively calls for help, the sight of Yukimura's pleading expression excites him, and he ends up masturbating.
One day, overwhelmed with guilt, Yukimura approaches him saying, "I want to thank you for saving me."
As Yukimura directs his goodwill toward him—completely unaware of his lustful feelings from that day—Kirie's guilt and anxiety gradually build up, burning hotter and hotter...?

Original JP