Yui, an office Yui without a boyfriend, tries to release her pent-up sexual desire by masturbating in the morning, playing with the electric massager on her bedside. Her favorite electric massager broke after being overused as a masturbation companion, and when Yui went to take out the trash, she found a live 'sex-relief Dutch boy' that had been thrown away. Yui, who is a caring Yui, carefully takes him back to her room and gives him a bath. When their strange life together begins, she puts a collar on the sex-relief boy, 'Mara', and starts to dote on him... Yui, who is aroused by the big dick sticking out of his pants, leads 'Mara' to the bed, pampers him with a breast-feeding handjob, and then joins him in a cowgirl position. Yui, whose sexual desire explodes after having sex for the first time in a long time, sweats and has intense orgasms, becoming completely absorbed in the act with 'Mara'! Yui is taken by 'Mara' to a world where they are alone, and they take off their office clothes, make love, and swear eternity with creampie sex! !