Why did Shi Leipeng go to oranges?

The reasons why Shi Leipeng left Kaoru for graduate school in Orange may be:

1. Contract Expiration: Shi Leipeng's contract with Kaoru may have expired, so he chose to leave.

2. Personal development: Shi Leipeng may hope to make a breakthrough in personal development. In order to achieve his career development goals, he chose to go to Orange for graduate school.

The above information is for reference only, and the specific reasons may only be clear to the parties.