Translated from original post:

My brother Tanito-Ojisan
twitter/outer1102
https://tanibitoojisan.fanbox.cc/
Her name is Furuya Koharu-chan, also known as the glasses slut kouhai!

Rather than looking for an ideal partner, Koharu-chan is oriented more towards finding men her age who have physical strength and skill and training them. She finds sex to be an integral part of her life, like eating or exercising.
Koharu-chan had her eyes on a senpai at school as a potential sexual partner, but she asked to have sex with him, he kept rejecting her, until she became impatient and decided to use more forceful tactics to have his virginity...
Once Koharu-chan had showed him with her body that if he ran away from her she'd assault him again, she would be able to hold him as much as she wanted...