One day, Yumu Hayakawa receives an anonymous love letter at work.
Expecting a female coworker to show up at the café where he’s summoned, he’s caught off guard when the one who walks in is a younger male colleague he’s never felt comfortable around.
What begins as an innocent trap soon turns into emotional turmoil—for both of them.
This is the story of a “pure” salaryman—hence, the Purelyman.