Even prosperous Japan has not escaped the demographic crisis! As a result, the government adopted a new course, and now private Osai Academy—a girls" school with ancient traditions—is switching to co‑education. In the first year of the experiment, the ratio of boys to girls barely reached 1:18, a fact that Takatoshi Cuda fully felt when he was tempted by the fact that the new school was right next to his home. By genre convention, the newly elected president of the student council, Sina Amakasa, decided to introduce a representative of the local gender minority into the council. Cuda fell under the hand—so that is how it happened. Now the main character works for the benefit of the academy together with three other council members—a straightforward but slightly insecure Sina, a dangerous jokester Aria, and an irritable genius dwarf Suzu. Realizing that the newcomer is not a bad or calm guy, his colleagues stopped being shy and let him learn what women talk about, as well as their rather peculiar views of the male world. Only a firm character and experience living with his younger sister allow poor Takatoshi to maintain mental health amid the daily routine of the student council, when sometimes something from the lovely lips falls out that says either "stand" or "fall." And it"s also a pity that the interest of the three girls in the main character is purely academic.