Lover in law 1

Tsutomu is actually living a normal life as a student. There is however a big difference between him and all the others. Together with his stepbrother's wife he is transferred far away for work. So his wife Mai is always eagerly waiting for him to return. When it is foreseeable that Shigeki will be away again for a longer cycle of time, Mai becomes annoyed and seeks comfort in Tsutomu, who gives her sexual pleasures. Both cannot get enough of each other. They make love every single day. When the new temp notices she of course becomes quite jealous and can also no longer outlast temptation...