The Debt Should Be Paid

Song Yujin and Lu Suo were taking a bath in the bathtub. Tonight, they were going to sleep with Song Ci and Lu Gan again.

Lu Suo blew a small bubble at Song Yujin and it landed on the latter's face.

'This is fun.' 

Lu Suo smiled and continued to blow bubbles at Song Yujin. It was his first time taking a bath with another person, so he could not help but goof off.

Song Yujin felt helpless and also a little displeased. Lu Suo was being really childish! Regardless, he did not stop him.

Lu Suo noticed the displeasure in Song Yujin's eyes. Instead of stopping, he kept blowing more bubbles! Why did Song Yujin have to be such a party pooper?