Translated from original post:

Jimiko is tall, tanned and often mistaken for a man.
When her Senpai came in to the documents room to help her, he saw her skin glistening with sweat and the situation of being alone together in a small room made him extremely horny...

She's not used to being called "cute" so she gets flustered when her Senpai keeps calling her cute while they're having sex and carelessly forgets to tell him to pull out resulting in him creampieing her (So hot!!)