Otoko no Isshō

"A Man's Lifetime") is a slice of life romance josei manga series written and illustrated by Keiko Nishi.

It was published by Shogakukan on Flowers magazine and in four volumes compiling the chapters.

[1] A live action romantic drama film adaptation was released on February 14, 2015.

[2] Volume 3 of the manga reached the 17th place on the weekly Oricon manga chart and, as of March 14, 2010, has sold 37,260 copies;[8] volume 4 reached the 3rd place[9] and, as of October 7, 2012, has sold 166,735 copies.

[11] In a review of the film, Maggie Lee of Variety said that "foot fetishists will rejoice, but this is an otherwise wholesome, mellow May–September romance.