Inaho Kaizuka, who was 18 years old, resided in a small apartment with his older sister, who was 24 years old. His height was 172cm which was an average height for a teenager. He had short tousled black hair.

Yuki Kaizuka, his older sister by six years, was a little shorter than him. She was 168cm, and even though she did not think much of it, many of his friends considered her to have an astonishing figure. She was not toned either, but she was a slender woman. She had straight black hair reaching down to her back and spectacular brown eyes. With the death of their parents, she tried her best to act a sisterly figure to her younger brother while they were raised as orphans at a government facility. Unfortunately for her, she was unprepared to the life of being a parental figure when she had to move out of the foster home and found it difficult to take care of her brother properly. Yuki was an easy-going carefree woman, who could sometimes be a little unsystematic. Inaho on the other hand was a neat and organized person who would daily cook his older sister and wake her up for work every morning. Very quickly it was Inaho who became her caretaker. For this reason, many people initially believed that Inaho was the older brother before they eventually learned the truth.

One day Inaho was home by himself cleaning and tidying up the mess that was his older sister's room when he found a tiny bag or pouch he had never seen before. However, what captured his curiosity was the thing beside it. It was what looked to be a diary. He chuckled to himself, he thought that only little girls kept diaries. However, he supposed not and of course, his interest got the better of his respect for his older sister's privacy. The majority of the pages were quite uninteresting. She was bragging about her lover and how amazing he was but as he perused on, the journal got much lewder. She began speaking about how awesome Koichiro Marito was in bed...how he knew precisely what to do to make her wild. Inaho not having any experience began having an unfamiliar sensation in his below region. Puzzled as to why he was feeling this way and captivated by this world that was completely new to him, he continued reading.

"Gosh Koichiro-senpai is so awesome in bed. If I raise my right leg up he begins plunging into my left and if I raise my left up he begins plunging into my right. He hits every area so well, I doubt I've ever orgasmed so much."

Inaho began becoming very aroused and a little guilty. He placed the diary back and of course headed to his room to take a look at the throbbing erection in his pants. He searched up the internet for a clue as to how to deal with a hardened penis. Then for the first time in his life, he learnt what masturbation was and the euphoria of ejaculating.

To be continued…

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