Natsuiro No Kowaremono After V101 Rj01041151 2021 File

First, I should confirm if this is a game developed by Rabbit Studio, as that's a common developer for such titles. The original release is around 2018, and the v1.01 update in 2021 might include bug fixes, new scenarios, or expanded content. The RJ number is a Japanese DLSite catalog number, so the user might be looking for details on that specific release.