Ethan made a call to his good friend, Doctor Song Zhihao.
"Lillie and I are on our way at your hospital. She needs a check-up." Ethan said while his are fixed on the road.
[What are her symptoms?] They heard Doctor Song's voice, the phone was on loudspeaker.
"We had lunch and she felt tired afterwards so she took a quick nap. And when we walked around the park for a short while, her complexion turned pale."
[For the pale complexion part, that might've been from the autumn air, but hmm...since it's associated with lethargy...]
[Miss Bai, did you had your period this month?] Right off the bat, Doctor Song assumed the major reason of those two symptoms.
"It was on the first week." Lillie replied without feeling bashful.
[Are you two sexually active—oh wait, of course you are.] Doctor Song cleared his throat, correcting himself. [When was the last time you had sex?]
"Last night." Ethan answered this time.