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Yuu is the younger brother of Maaya. All his schoolmates say his older sister is a kind and beautiful girl with amazing boobs. He actually thinks the same way and considers his sister to be the cutest girl in the world, but he does... read more

Yuu is the younger brother of Maaya. All his schoolmates say his older sister is a kind and beautiful girl with amazing boobs. He actually thinks the same way and considers his sister to be the cutest girl in the world, but he doesn't like his friends looking at his sister's breasts and at times he becomes very protective. He has always been very close to Maaya, who has always been very kind to him. They used to do absolutely everything together, including bathing. But his sister's actions had begun to trouble him as she kept exposing herself more and more. He was completely fascinated by his sister, and not only had he begun to find her to be very pretty but also very erotic. He had recently begun to fantasize about Maaya while masturbating with the help of his friend's eromanga, but she caught him in the act as he was moaning loudly while exclaiming "onee-chan". She asked him whom he was calling while he was relieving himself, the magazine's onee-chan or she, Maaya-nee. And this event marked the beginning of their story.

♀ f

Maaya is the older sister of Yuu. She attends the same school as her brother and is his senpai. She is very famous and loved by all in the academy. She loves Yuu very much and often asks him to massage her shoulders after getting ... read more

Maaya is the older sister of Yuu. She attends the same school as her brother and is his senpai. She is very famous and loved by all in the academy. She loves Yuu very much and often asks him to massage her shoulders after getting out of the bath. She shows almost no embarrassment towards him, even complaining to him that her breasts keep on getting bigger. One day when she got home from her club activities early, Maaya heard Yuu calling her name in his room and she decided to go see if he was okay, only to find him in a very embarrassing situation. Her reaction, however, is surprising: she asks Yuu if he's calling the onee-san in his manga or her. And this event marked the beginning of their story.

♀ f

She was Yuu's classmate last year and is in the same grade as him. A once extremely shy girl, she gained confidence in herself after Yuu reached out to her. She now has a lot of friends but hasn't forgotten the boy who gave her a ... read more

She was Yuu's classmate last year and is in the same grade as him. A once extremely shy girl, she gained confidence in herself after Yuu reached out to her. She now has a lot of friends but hasn't forgotten the boy who gave her a chance back then...

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Kanemoto is a classmate and a friend of Yuu. He - like a lot of boys at the academy - finds Maaya really sexy and longing for Yuu to be his little brother. Accor... read more

Kanemoto is a classmate and a friend of Yuu. He - like a lot of boys at the academy - finds Maaya really sexy and longing for Yuu to be his little brother. According to him, he and Yuu are balls friends and because they are balls friends, he honors Yuu by offering him the ultimate porn book for Yuu to satisfy his needs : an incestuous eromanga between a big sister and her little brother.

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He is the father of Maaya and Yuu. He and his wife are happy to see that their children get ... read more

He is the father of Maaya and Yuu. He and his wife are happy to see that their children get on well and don't argue with each other. They are amused to see them so close when Maaya asks Yuu to massage her shoulders. To see them like this ( especially Maaya who is always smiling ) warms their heart and comfort them. However, they don't suspect that their daughter's smile hides a whole other thing than a simple older sister/younger brother relationship.

♀ f

She is the mother of Maaya and Yuu. She and her husband are happy to see that their children... read more

She is the mother of Maaya and Yuu. She and her husband are happy to see that their children get on well and don't argue with each other. They are amused to see them so close when Maaya asks Yuu to massage her shoulders. To see them like this ( especially Maaya who is always smiling ) warms their heart and comfort them. However, they don't suspect that their daughter's smile hides a whole other thing than a simple older sister/younger brother relationship. According to her and her husband, Maaya is the exact copy of her mother when she was her age.

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The homeroom teacher of Yuu's class and also a history teacher. He is quite direct with his students and he doesn't hesitate to compliment them if they work well as their "deprive" of summer holidays when the results are insufficie... read more

The homeroom teacher of Yuu's class and also a history teacher. He is quite direct with his students and he doesn't hesitate to compliment them if they work well as their "deprive" of summer holidays when the results are insufficient.