♂ m

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 ... read more

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...!?

♀ f

The youngest of the 3 sisters. She is a talented student who works as the student council president and always stays at the top in grades. The eyes gives off an impression of being sharp and cool. Sense of responsibility is strong and hates bending of rules. She doesn't forgive either students or t... read more

The youngest of the 3 sisters. She is a talented student who works as the student council president and always stays at the top in grades. The eyes gives off an impression of being sharp and cool. Sense of responsibility is strong and hates bending of rules. She doesn't forgive either students or teachers for this. Even takes a step back inside the school even for her beloved younger brother. Always takes a strict attitude towards him. However originally, since she was a spoilt child, wants her brother to give her attention. After coming home and becoming alone in her room, spends time flirting with a stuffed doll named after her brother. When not getting attention from him, in displeasure, she takes out her frustration on the stuffed doll. Also, she seems to like the smell of her brother. Sometimes, she is seen as sniffing her brother's t-shirt in the bathroom. She pays attention to her brother often but then denies this observation by saying "This is different.".

♀ f

The eldest of the 3 sisters. Homeroom teacher of the protagonist. Has a frank personality but is relied and supported by her co-workers and students. However, has an opposite impression in her younger brother's mind. After coming home, loiters around wearing only a shirt and a piece of underwear.... read more

The eldest of the 3 sisters. Homeroom teacher of the protagonist. Has a frank personality but is relied and supported by her co-workers and students. However, has an opposite impression in her younger brother's mind. After coming home, loiters around wearing only a shirt and a piece of underwear. Cleaning, laundry and even preparations of making food, everything is left for her brother to do. She is number 1 in popularity inside the school because of her appearance and personality. But she has no interest in any other man except her brother. Teases the protagonist even inside the school. When catches the sight of him, tries to casually touch him or begins sexually harassing him. Other guys shows signs of jealousy but the protagonist himself feels very embarrassed and perplexed.

♀ f

The second among the 3 sisters. A nurse, who works in the hospital next to the school. Although has a very gentle and cheerful personality, when it comes to taking care of patients, is very earnest. Knowledge regarding nursing is also very deep. However, on the other hand, is a very heavy drinker ... read more

The second among the 3 sisters. A nurse, who works in the hospital next to the school. Although has a very gentle and cheerful personality, when it comes to taking care of patients, is very earnest. Knowledge regarding nursing is also very deep. However, on the other hand, is a very heavy drinker to the point, that she says that she will die if she cannot drink alcohol every day. She wants to drink while watching her younger brother. She never drinks, if not in front of her brother. Although becomes pessimistic while drinking, her aggressiveness towards her brother increases. Starts approaching him while taking off her clothes. One time when her brother got angry, started taking clothes off, while crying. Even after waking up from her drunk state, remembers "I will take responsibility" and so approaches her brother again.