The wife who applied this time, looking for excitement, is Yui, who seems to be a gentle and serious person. It is surprising that she usually works as a mathematics teacher at a cram school. Yui's desire is to "develop her portio and cum a lot." When her portio is lightly stimulated with a finger, she cums instantly! From there, her sensitivity increases rapidly and it's her first lesbian experience! Furthermore, in a mixed threesome, she is made to cum by the actor and actress.