Xiu Xiu suffers from abdominal pain due to kidney stones and gets sent to the hospital. Jin Shu suspects that Xiu Xiu has Obsessive-Compulsive Disorder (OCD) when he learns that Xiu Xiu got kidney stones from holding back urine as she does not dare to use public toilets. He also thinks that the disorder has affected her daily life and health. He tries to provide some positive counselling after seeing that Zhi Xing has violent tendencies.
