Based on an otome game with the same name. Igarashi Yuna is a transfer student in St. Louis High. This manga covers each of the guy's routes in each chapter.

In the series:

V.1 - Storm Lover

V.2 - Natsukoi!!

Bakumatsu Renka Karyuu Kenshiden takes place in the first year of Tokugawa when the Shogunate and the emperor's supporters fight for supremacy. Shizuki Rin is a girl growing up in a Dojo who lost her memory of the past. Secretly the dojo deals with information. Including the violent Shinsengumi, some bishies and children who aim to get stronger.