Super funny idea. The premise is that the husband has been stressed out from work so much that the couple haven't had sex for 5 years! So they bought this sex therapy tool to get the hubby back into shape. The wife totally supports the hubby having to use this tool to get his LB back into functioning shape. Of course the wifey doesn't like the hubby snogging the tool that often as she feels that he should be only snogging her. Soon the hubby is getting the feeling back and is soon shagging his wife again that by time 1 month passes, the tool is leaking fluids onto the wall.
The couple figures the tool has built up an excess amount of pussy juices so they proceed to masturbate and finger her until she squirts a large amount of juices. At the same time they cover the tool's mouth as they don't want to disturb the neighbors. (ah, Japanese ppl are so considerate of their neighbors' peace!).
After the tool has squirted, the couple has decided that their sex life back to normal and that maybe they should throw away the tool.
I love Japanese wives! So supportive of the hubby!