This is a collection of slice-of-life omnibus shorts about various girls and what happens to them at railroad crossings. Various dramatic pieces that occur while you hear “Clank, clank, clank” in the background. The bittersweet conversations that high school girls have, strange tales of the occult discussed by grade schoolers, or a boy being head over heels over a sexy girl... A series that’s all railroad crossings all the time that’ll be filled with situations that railroad crossing fans can’t resist

(Source: Crunchyroll)
Note: Chapter numbering differs slightly from Japanese and English versions with a English version being a chapter short. Chapter 33 in English version (or 35 in Japanese) is not published in Crunchyroll.