Uma to Shiokaze ni Dakarete (2005)

Yukio broke up with his lover Ryo and came to the stables where the racehorse Fuyuno Inazuma was. He had longed to become a horse trainer since high school when he first felt passion for the race horse. Life in the stables had begun. Fuyuno Inazuma had lost 153 races in a row, was injured and was in danger of retirement. Yukio took good care of him. The owner of the stable was gay. When learning that Yukio was also gay he asked to sleep with him in return for Yukio being allowed to take care of the horse. Yukio accepted this arrangement because of his love for Fuyuno Inazuma and his desire to continue taking care of him, However, one day he encounters the owner's jealous lover at an hattenba. (Source: Douban)