Based on the provided story and the criteria for rating the Tragedy Degree and Comedy Degree, here are the evaluations:

**Tragedy Degree:**
The story does not include any tragic elements. The characters are happy and positive throughout, with no moments of emotional setbacks or heartbreak. Therefore, the Tragedy Degree is 1 point.

**Comedy Degree:**
The story is generally light-hearted and positive, ending on an optimistic note with Emma and Lucas excited about creating their own bookstore. However, it lacks strong comedic aspects or extremely happy endings that are meant to be emotionally delightful in a comedic sense. Thus, the Comedy Degree is 5 points, as it is a relatively light-hearted and pleasant story without being overtly comedic.

Here is the JSON format output:

```json
{
  "TragedyDegree": 1,
  "ComedyDegree": 5
}
```
