Self Portrait (Prequel)
From Blissful Sin:
Track team member Kashiwagi Ayumu has put aside his secret feelings for his classmate, Shinohara Takahito.
One day, his track club senpai, Sawatari Atsushi, realizes Ayumu’s feelings, and embraces Ayumu against his will in attempt to cure his own boredom.
Sawatari seems cold hearted, but suddenly reveals a tenderness to the resisting Ayumu, but…?!