Legally, Aki Sora was never licensed in North America or Europe. No streaming service pays for the rights. Consequently, you will only find this episode through archival methods (e.g., Internet Archive, private anime trackers, or fan-hosted Google Drives).
It is better because it abandons the harem-adjacent nonsense of the middle episodes. It is better because it focuses on Sora—the sister who actually has a personality—rather than the milquetoast Aki. And it is better because it proves that adult anime can be about feelings rather than just friction. aki sora episode 4 better
If you are looking for more of the story beyond the animated episodes, the is the only way to continue. The anime covers only the beginning of the relationship between Aki and Sora, while the manga concludes the story over 30 chapters. Why you might be seeing "Episode 4" Legally, Aki Sora was never licensed in North
Several factors might contribute to episode 4 being considered "better" than others: It is better because it abandons the harem-adjacent