Saeyoung usually flirted with you and it made you feel nervous but not in a bad way. Whenever he had the chance he flirted with you.

one day it occurred to him to do something that would make you much more nervous, he lifted his shirt and while you were busy he grabbed your hand and placed it on his abdomen, which had his abs. You were totally nervous, to what he said.

"Hahaha, oh...~ so you're nervous?"