BSN here! This is Kojima Video's " Tsukin Rush Hatsu Taiken?", a short story featured in Cyberia ManiaEX Chi*ro* Paradise Volume 10. Enjoy! (Translated by BSN)
yes girl, there's a reason why there's a women-only trains. https://en.wikipedia.org/wiki/Women-only_passenger_car (its actually interesting how many country have them)