From Nakama:

Shijo Kei has no interest in men younger than 40! Because of this fetish, he had gotten into numerous indecent relationship and heartbreaks. His kohai, Hiro, can always be counted on to comfort Kei as his “cushion”. Until one day, facing yet another Kei’s self-inflicted anguish, Hiro finally snapped and declared, “Try me!” before he crushed a totally stunned Kei into the bed with his pent-up passion!! Can Kei’s broken heart be mended by the sweet pain of a younger man’s vigorous embrace…