The protagonist, Sota, lives in a share house whose roommates turn out to be three succubus sisters! The eldest, Misa, is a doting big-sister type. The second daughter, Rin, is cool and quiet. The youngest, Mei, has a submissive personality. As their designated “meal provider” (!?), Sota is drained by the three of them every single day. But during Golden Week, Misa and Mei leave for a trip, and he ends up spending time alone with Rin. Rin, who had secretly been curious about Sota for some time, invites him to have sex out of curiosity. Unable to refuse the charming Rin’s advances, the two gradually find themselves swept into a nonstop, passion-filled holiday together…! Then, on the final day of Golden Week, Misa and Mei return home and join in, escalating things into an even more chaotic group encounter!