Amakami Kotarou

In the lower region in terms of results, exercise and even appearance. An existence that doesn't stand out too much.

However, the results in home economics and after-school cleaning are different. He has ability of surpassing even his teacher in terms of cooking; during the time of cleaning, shows ability of working quicker and more refined than even maids. His skill in domestic chores, is unimaginable for a student. Rumour of him being a skilled housewife is spread from his friends from class.

All of this skill was gained due to taking care of his sisters. The person himself is not very pleased with it.

However, has curiosity towards lewd things as expected of a man, his age. While he was worried about his defenceless sisters, his inner feelings were of a keen interest in offering his sperm to them.

While having a feeling of immorality, will he himself become aggressive...!?