Despite his strong dislike for the prideful attitude of those who possess wings, Shuu takes on a job at a manor belonging to a winged person where he is asked to carry out a range of tasks. During his duties, he meets Rai, the manor's owner and known for being a demanding individual. The situation becomes awkward when Rai instructs Shuu to "incubate an egg." As they negotiate their connection in a world where humans and winged beings coexist, their feelings for each other start to grow into a romantic relationship.
