His father-in-law, Kameo, has lost his wife and has become old and ill. - Considering his father is lonely and has no friends, the son decides to ask his wife, Nene, to provide him with care and guidance on how to use SNS. - Then, Kameo, wanting a ``high rating,'' closes up Nene's big breasts. - The video spreads unexpectedly and quickly satisfies Kameo's loneliness and Nene's desire for approval. - Both of them thought that they could do no more than this, but their videos became more and more extreme, and the two of them started sending out erotic nursing care videos of their big-breasted wives to the whole world. - From chewing and mouth-to-mouth, to bathing and nursing care, to giving blowjobs, and finally...the two become sexual partners who need each other as influencers.