The protagonist Nonomiya En is a boring student with no friends or love interests due to his negative thinking. Suddenly, four brides appear in his life, and he struggles to live with them while being wary of strangers. Despite the chaotic situations that arise, they all try to get along with the motto of "everyone is friends". The brides have various backgrounds, some naive, some outdated, some angels, some demons, and even a witch. En continues to struggle with his unreliable nature, but the enjoyable life with the brides cannot continue forever. Eventually, he must make a decision when the time comes to choose only one of them.