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Kouta is the protagonist. He is a virgin geek with some of the best grades in school, standing at the top of his class year after year. One day he meets Shiina Chieri, a classmate of his, in front of a convenience store. After hel... read more

Kouta is the protagonist. He is a virgin geek with some of the best grades in school, standing at the top of his class year after year. One day he meets Shiina Chieri, a classmate of his, in front of a convenience store. After helping her with her studies, he is then offered sexual favors as a way to thank him for his tutoring, but only on the condition that they don't have penetrative sex. He is immediately captivated by Chii-chan's revealing clothes, voluptuous body, cute face and promiscuous behavior, all of which only make him want to lose his virginity with her even more. Despite knowing that Chii-chan has a boyfriend, he still develops feelings for her beyond mere sexual attraction. This results in him developing deep jealousy of Chii-chan's boyfriend, as well as suffering in fear of his feelings never being reciprocated.

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Chii-chan is a classmate of Kouta. She is first seen waiting for him on a summer day in front of a convenience store. She asks him for help with her studies, seeing as her terrible grades could be an issue for her in the future. Ko... read more

Chii-chan is a classmate of Kouta. She is first seen waiting for him on a summer day in front of a convenience store. She asks him for help with her studies, seeing as her terrible grades could be an issue for her in the future. Kouta agrees to help her, which leads to Chii-chan offering sexual favors in exchange for his tutoring. Because she has a boyfriend, she doesn't allow Kouta to have penetrative sex with her, believing that it's not cheating as long as it's not "real sex."