ONGP-014 A relative's aunt's side story: During a family banquet, an aunt and nephew engage in double incestuous sex that must never be discovered!!

All the relatives gather for the New Year. After a brief exchange of greetings, alcohol and delicious food are served, and the house is in a festive mood. However, two sets of parents and c** are not at peace in the midst of all this... The aunt and nephew of the Yabe and Nanami families have been in a relationship for some time. The four of them have no idea that the father and son are actually in a physical relationship, and they have been looking forward to this day, the only day of the year when they can meet openly. The two sets try to keep their affair a secret from the other relatives... but unfortunately, they run into each other and are f** to find out the whole truth. The four cannot hide their awkwardness, but the situation suddenly turns into a huge, all-out party...