Thanks for downloading, Enjoy your Anime (o˘◡˘o) Heroine's release is far superior to HorribleSubs'. I collected all the episodes I could find from them.
[Heroine] Niji-iro Days - 04v2 [50DFDFB2].mkv and [Heroine] Niji-iro Days - 05v2 [587D780D].mkv
Missing those two episodes. Unseeded here and couldn't find them anywhere else. If anyone is willing to upload them, that would be great. Enjoy!