Tomohiro Izumi, an introvert, is randomly selected as student council president, but rumors circulate, leading to an unprecedented battle with former president Shio.

In the aftermath of World War II, "Sibir Base" stands isolated in a region littered with abandoned biological weapons known as "Iron Army." Leichtes, individuals brought from a defeated nation to atone for war crimes, live at this base. As they carry out their daily routines, they find themselves consumed by memories of what they have lost.

It's only the end of November and the hot springs town Yomase-machi was already a winter wonderland, having been dyed white from the falling snow. Yuuki moved to this snowy town to help his grandparents shovel snow at their home, the former boarding house Yamanouchi-sou. He met many warm-hearted people, including the shrine maiden Sayuki who worries about her inability to properly greet strangers, his mysterious but playful housemate and senpai Mizuki, and the local café's cheerful and energetic kouhai mascot Koharu. Even though he was still feeling lost, he tried to get used to living in this snowy land. During that time, his grandfather suggested that he find love while he is still young and lead a new life in earnest. Now's the time for him to take the first step and fall in love.

The head maid of a rich household wants to retire and choose someone else to replace her. Before she goes however, she decides to give her young master a farewell gift in the form of a hot sex session, followed by interviewing new potential maid recruits with another sex session. Can't complain.

These two OVA’s are based on the adult manga by Midori no Ruupe. The timeline in the two OVA’s intertwines. First when both OVA’s are watched is the whole story revealed. The stepchildren Ichina and Imako used to live under the same roof, just like brother and sister. However, the intimacy of sex, which started with innocent interest, distorts the relationship between the two.