The second part of Oyakodon tells the story of Mashiyama Tsukasa. The first is the story of Leyan. The second part tells the story of Zhenshan, but he is related to Lai Yang in the first part. People from the first part will also appear here, and eventually they will all appear in the third part, so the second part serves the entire story.
Intention: What should I do if I fall in love with someone I shouldn't love?