People was starting to notice.

It felt like your heart stopped. At first you didn't care, but now youre ao embarrassed since you're having sex with some guy on the train. You didn't even notice that Haru made your entire body face everyone of the train until he slammed right into you. "W-Wait, Haru!"
"I've noticed that you stopped when you realized people were looking." He rubbed your nipples, whispering seductively in your ear. "Did you get more aroused?" He went inside of you deeply, theusting long and hard.