Su Muchen's main purpose for coming to the Secret Realm this time was to bring Brother Ox back.

The Yuanrong Mouse also met with its parents and grandparents.

Interestingly enough, the situation between the Yuanrong Mouse and Father Mouse was somewhat similar to that of Su Muchen and his father.

During the last strongest academy competition, Father Mouse, full of passion and with a unique purpose, traveled the world to find and fight the enemies that had battled the Yuanrong Mouse.