Indecent elder sister, It is. The elder sister and the mother-in-law -san, The sister-in-law is in the this place, too. The ecchi. Ryuichi Moroboshi of the college student who has returned to his parents home was surrounded by pear sand of widows Kyoko and half-sister, lodgers Chinatsu, Kaede and Manamis five beauties with a stepmother and was sending every day made in distress. That night, To the room of Ryuuiicho who was working on the summer homework, It is attacked by Chinatsu that has entered with the drunken man by the pole rough appearance, As for that, that and the virgin is lost. Continuously in daytime of the next day, Next time with Manami of the stark-naked in the bathroom. The story that raises the act by leading of Chinatsu and Manamis firing in rapid succession an Obscene word H, Only that started not yet!?