Oba-san

Obasan is the unnamed aunt of Sui-kun and the mother of Junpei. One day, in order to get his help in the house rearrangement, Jinpei placed a porn DVD in his player in the living room and stated the he would tell to his mother that it was lent by him, so Sui-kun visied his home when Jinpei is out in order to take it before it's too late, but a storm and his aunt made the things take an unexpected turn.