Konomi, who has a boyfriend struggling with ED, remains sexually frustrated even after having sex with her beloved boyfriend. What she really wants is to have sex with him every day, drowning in pleasure! So she comes up with an idea and takes her boyfriend, who loves NTR, to a fetish brothel specializing in cuckolding, saying, "There's apparently this thing called a cuckolding service..." In front of her watching boyfriend, Konomi strips naked and releases her pent-up sexual desires with an older man. Meanwhile, her perverted boyfriend gets excited watching her get fucked by a stranger. What will become of this win-win relationship?