Since dropping out of college and with both parents deceased, Yamada has lived in isolation in his apartment, not going out, not working, and avoiding contact with others. Yamada has been living on social welfare for 30 years. SakuraSaku Society, a group established to help individuals suffering from hikikomori like Yamada, sends Suzu to assist him. Suzu is a beautiful married woman who has been actively involved in volunteer clubs since college, aiming to help those in need. Upon entering Yamada's home, trash is scattered everywhere, and the stench makes Suzu crinkle her nose. Nevertheless, she does not harbor any hatred or disgust towards Yamada; she enthusiastically helps him clean up and organize everything. When she comes across a pile of rolled-up papers, a quick sniff tells Suzu that they are used for cleaning up semen. Understanding that human sexual needs are perfectly normal, Suzu is willing to assist Yamada in satisfying his sexual desires...