Creating Nested custom fields

I am using this plugin to create custom fields and custom post-types. I am able to create repeater custom fields in the following format.

1         Dummy Name1     Location1
2         Dummy Name2     Location2
..... and so on

This field values are repeated and can be created n number of time. What I have trouble doing is this format

Session 2015-16
1         Dummy Name1     Location1
2         Dummy Name2     Location2
Session 2016-17
11         Dummy Name11     Location11
12         Dummy Name12     Location12
Session 2018-19
21         Dummy Name21     Location21
22         Dummy Name22     Location22
..... and so on

Is it possible to create such format with the same plugin? If not how is it possible to create such layout.

Thanks, Puneet