The master-disciple bond between Chu He and Shen Ciyu.
Chu He (master, attack)
Shen Ciyu (disciple, accepted)
Shen Ciyu liked the junior sister until she discovered a secret... The junior sister is curved?! He was cheated on by his own sister! What Shen Ciyu saw in despair was the black figure, and she slowly accepted the reality and him.
Purpose: Let everyone understand the principle of "mistaking life once you see Master"